gs_nuxt/node_modules/@vue/test-utils/dist/vue-test-utils.umd.js

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('vue'), require('vue-template-compiler')) :
  typeof define === 'function' && define.amd ? define(['exports', 'vue', 'vue-template-compiler'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.VueTestUtils = {}, global.Vue, global.VueTemplateCompiler));
}(this, (function (exports, Vue, vueTemplateCompiler) { 'use strict';

  function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

  var Vue__default = /*#__PURE__*/_interopDefaultLegacy(Vue);

  // 

  function createVNodes(vm, slotValue, name) {
    var el = vueTemplateCompiler.compileToFunctions(
      ("<div><template slot=" + name + ">" + slotValue + "</template></div>")
    );
    var _staticRenderFns = vm._renderProxy.$options.staticRenderFns;
    var _staticTrees = vm._renderProxy._staticTrees;
    vm._renderProxy._staticTrees = [];
    vm._renderProxy.$options.staticRenderFns = el.staticRenderFns;
    var vnode = el.render.call(vm._renderProxy, vm.$createElement);
    vm._renderProxy.$options.staticRenderFns = _staticRenderFns;
    vm._renderProxy._staticTrees = _staticTrees;
    return vnode.children[0]
  }

  function createVNodesForSlot(
    vm,
    slotValue,
    name
  ) {
    if (typeof slotValue === 'string') {
      return createVNodes(vm, slotValue, name)
    }
    var vnode = vm.$createElement(slotValue)
    ;(vnode.data || (vnode.data = {})).slot = name;
    return vnode
  }

  function createSlotVNodes(
    vm,
    slots
  ) {
    return Object.keys(slots).reduce(function (acc, key) {
      var content = slots[key];
      if (Array.isArray(content)) {
        var nodes = content.map(function (slotDef) { return createVNodesForSlot(vm, slotDef, key); }
        );
        return acc.concat(nodes)
      }

      return acc.concat(createVNodesForSlot(vm, content, key))
    }, [])
  }

  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

  function createCommonjsModule(fn, basedir, module) {
  	return module = {
  	  path: basedir,
  	  exports: {},
  	  require: function (path, base) {
        return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
      }
  	}, fn(module, module.exports), module.exports;
  }

  function getCjsExportFromNamespace (n) {
  	return n && n['default'] || n;
  }

  function commonjsRequire () {
  	throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
  }

  var semver = createCommonjsModule(function (module, exports) {
  exports = module.exports = SemVer;

  var debug;
  /* istanbul ignore next */
  if (typeof process === 'object' &&
      process.env &&
      process.env.NODE_DEBUG &&
      /\bsemver\b/i.test(process.env.NODE_DEBUG)) {
    debug = function () {
      var args = Array.prototype.slice.call(arguments, 0);
      args.unshift('SEMVER');
      console.log.apply(console, args);
    };
  } else {
    debug = function () {};
  }

  // Note: this is the semver.org version of the spec that it implements
  // Not necessarily the package version of this code.
  exports.SEMVER_SPEC_VERSION = '2.0.0';

  var MAX_LENGTH = 256;
  var MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER ||
    /* istanbul ignore next */ 9007199254740991;

  // Max safe segment length for coercion.
  var MAX_SAFE_COMPONENT_LENGTH = 16;

  // The actual regexps go on exports.re
  var re = exports.re = [];
  var src = exports.src = [];
  var t = exports.tokens = {};
  var R = 0;

  function tok (n) {
    t[n] = R++;
  }

  // The following Regular Expressions can be used for tokenizing,
  // validating, and parsing SemVer version strings.

  // ## Numeric Identifier
  // A single `0`, or a non-zero digit followed by zero or more digits.

  tok('NUMERICIDENTIFIER');
  src[t.NUMERICIDENTIFIER] = '0|[1-9]\\d*';
  tok('NUMERICIDENTIFIERLOOSE');
  src[t.NUMERICIDENTIFIERLOOSE] = '[0-9]+';

  // ## Non-numeric Identifier
  // Zero or more digits, followed by a letter or hyphen, and then zero or
  // more letters, digits, or hyphens.

  tok('NONNUMERICIDENTIFIER');
  src[t.NONNUMERICIDENTIFIER] = '\\d*[a-zA-Z-][a-zA-Z0-9-]*';

  // ## Main Version
  // Three dot-separated numeric identifiers.

  tok('MAINVERSION');
  src[t.MAINVERSION] = '(' + src[t.NUMERICIDENTIFIER] + ')\\.' +
                     '(' + src[t.NUMERICIDENTIFIER] + ')\\.' +
                     '(' + src[t.NUMERICIDENTIFIER] + ')';

  tok('MAINVERSIONLOOSE');
  src[t.MAINVERSIONLOOSE] = '(' + src[t.NUMERICIDENTIFIERLOOSE] + ')\\.' +
                          '(' + src[t.NUMERICIDENTIFIERLOOSE] + ')\\.' +
                          '(' + src[t.NUMERICIDENTIFIERLOOSE] + ')';

  // ## Pre-release Version Identifier
  // A numeric identifier, or a non-numeric identifier.

  tok('PRERELEASEIDENTIFIER');
  src[t.PRERELEASEIDENTIFIER] = '(?:' + src[t.NUMERICIDENTIFIER] +
                              '|' + src[t.NONNUMERICIDENTIFIER] + ')';

  tok('PRERELEASEIDENTIFIERLOOSE');
  src[t.PRERELEASEIDENTIFIERLOOSE] = '(?:' + src[t.NUMERICIDENTIFIERLOOSE] +
                                   '|' + src[t.NONNUMERICIDENTIFIER] + ')';

  // ## Pre-release Version
  // Hyphen, followed by one or more dot-separated pre-release version
  // identifiers.

  tok('PRERELEASE');
  src[t.PRERELEASE] = '(?:-(' + src[t.PRERELEASEIDENTIFIER] +
                    '(?:\\.' + src[t.PRERELEASEIDENTIFIER] + ')*))';

  tok('PRERELEASELOOSE');
  src[t.PRERELEASELOOSE] = '(?:-?(' + src[t.PRERELEASEIDENTIFIERLOOSE] +
                         '(?:\\.' + src[t.PRERELEASEIDENTIFIERLOOSE] + ')*))';

  // ## Build Metadata Identifier
  // Any combination of digits, letters, or hyphens.

  tok('BUILDIDENTIFIER');
  src[t.BUILDIDENTIFIER] = '[0-9A-Za-z-]+';

  // ## Build Metadata
  // Plus sign, followed by one or more period-separated build metadata
  // identifiers.

  tok('BUILD');
  src[t.BUILD] = '(?:\\+(' + src[t.BUILDIDENTIFIER] +
               '(?:\\.' + src[t.BUILDIDENTIFIER] + ')*))';

  // ## Full Version String
  // A main version, followed optionally by a pre-release version and
  // build metadata.

  // Note that the only major, minor, patch, and pre-release sections of
  // the version string are capturing groups.  The build metadata is not a
  // capturing group, because it should not ever be used in version
  // comparison.

  tok('FULL');
  tok('FULLPLAIN');
  src[t.FULLPLAIN] = 'v?' + src[t.MAINVERSION] +
                    src[t.PRERELEASE] + '?' +
                    src[t.BUILD] + '?';

  src[t.FULL] = '^' + src[t.FULLPLAIN] + '$';

  // like full, but allows v1.2.3 and =1.2.3, which people do sometimes.
  // also, 1.0.0alpha1 (prerelease without the hyphen) which is pretty
  // common in the npm registry.
  tok('LOOSEPLAIN');
  src[t.LOOSEPLAIN] = '[v=\\s]*' + src[t.MAINVERSIONLOOSE] +
                    src[t.PRERELEASELOOSE] + '?' +
                    src[t.BUILD] + '?';

  tok('LOOSE');
  src[t.LOOSE] = '^' + src[t.LOOSEPLAIN] + '$';

  tok('GTLT');
  src[t.GTLT] = '((?:<|>)?=?)';

  // Something like "2.*" or "1.2.x".
  // Note that "x.x" is a valid xRange identifer, meaning "any version"
  // Only the first item is strictly required.
  tok('XRANGEIDENTIFIERLOOSE');
  src[t.XRANGEIDENTIFIERLOOSE] = src[t.NUMERICIDENTIFIERLOOSE] + '|x|X|\\*';
  tok('XRANGEIDENTIFIER');
  src[t.XRANGEIDENTIFIER] = src[t.NUMERICIDENTIFIER] + '|x|X|\\*';

  tok('XRANGEPLAIN');
  src[t.XRANGEPLAIN] = '[v=\\s]*(' + src[t.XRANGEIDENTIFIER] + ')' +
                     '(?:\\.(' + src[t.XRANGEIDENTIFIER] + ')' +
                     '(?:\\.(' + src[t.XRANGEIDENTIFIER] + ')' +
                     '(?:' + src[t.PRERELEASE] + ')?' +
                     src[t.BUILD] + '?' +
                     ')?)?';

  tok('XRANGEPLAINLOOSE');
  src[t.XRANGEPLAINLOOSE] = '[v=\\s]*(' + src[t.XRANGEIDENTIFIERLOOSE] + ')' +
                          '(?:\\.(' + src[t.XRANGEIDENTIFIERLOOSE] + ')' +
                          '(?:\\.(' + src[t.XRANGEIDENTIFIERLOOSE] + ')' +
                          '(?:' + src[t.PRERELEASELOOSE] + ')?' +
                          src[t.BUILD] + '?' +
                          ')?)?';

  tok('XRANGE');
  src[t.XRANGE] = '^' + src[t.GTLT] + '\\s*' + src[t.XRANGEPLAIN] + '$';
  tok('XRANGELOOSE');
  src[t.XRANGELOOSE] = '^' + src[t.GTLT] + '\\s*' + src[t.XRANGEPLAINLOOSE] + '$';

  // Coercion.
  // Extract anything that could conceivably be a part of a valid semver
  tok('COERCE');
  src[t.COERCE] = '(^|[^\\d])' +
                '(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '})' +
                '(?:\\.(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '}))?' +
                '(?:\\.(\\d{1,' + MAX_SAFE_COMPONENT_LENGTH + '}))?' +
                '(?:$|[^\\d])';
  tok('COERCERTL');
  re[t.COERCERTL] = new RegExp(src[t.COERCE], 'g');

  // Tilde ranges.
  // Meaning is "reasonably at or greater than"
  tok('LONETILDE');
  src[t.LONETILDE] = '(?:~>?)';

  tok('TILDETRIM');
  src[t.TILDETRIM] = '(\\s*)' + src[t.LONETILDE] + '\\s+';
  re[t.TILDETRIM] = new RegExp(src[t.TILDETRIM], 'g');
  var tildeTrimReplace = '$1~';

  tok('TILDE');
  src[t.TILDE] = '^' + src[t.LONETILDE] + src[t.XRANGEPLAIN] + '$';
  tok('TILDELOOSE');
  src[t.TILDELOOSE] = '^' + src[t.LONETILDE] + src[t.XRANGEPLAINLOOSE] + '$';

  // Caret ranges.
  // Meaning is "at least and backwards compatible with"
  tok('LONECARET');
  src[t.LONECARET] = '(?:\\^)';

  tok('CARETTRIM');
  src[t.CARETTRIM] = '(\\s*)' + src[t.LONECARET] + '\\s+';
  re[t.CARETTRIM] = new RegExp(src[t.CARETTRIM], 'g');
  var caretTrimReplace = '$1^';

  tok('CARET');
  src[t.CARET] = '^' + src[t.LONECARET] + src[t.XRANGEPLAIN] + '$';
  tok('CARETLOOSE');
  src[t.CARETLOOSE] = '^' + src[t.LONECARET] + src[t.XRANGEPLAINLOOSE] + '$';

  // A simple gt/lt/eq thing, or just "" to indicate "any version"
  tok('COMPARATORLOOSE');
  src[t.COMPARATORLOOSE] = '^' + src[t.GTLT] + '\\s*(' + src[t.LOOSEPLAIN] + ')$|^$';
  tok('COMPARATOR');
  src[t.COMPARATOR] = '^' + src[t.GTLT] + '\\s*(' + src[t.FULLPLAIN] + ')$|^$';

  // An expression to strip any whitespace between the gtlt and the thing
  // it modifies, so that `> 1.2.3` ==> `>1.2.3`
  tok('COMPARATORTRIM');
  src[t.COMPARATORTRIM] = '(\\s*)' + src[t.GTLT] +
                        '\\s*(' + src[t.LOOSEPLAIN] + '|' + src[t.XRANGEPLAIN] + ')';

  // this one has to use the /g flag
  re[t.COMPARATORTRIM] = new RegExp(src[t.COMPARATORTRIM], 'g');
  var comparatorTrimReplace = '$1$2$3';

  // Something like `1.2.3 - 1.2.4`
  // Note that these all use the loose form, because they'll be
  // checked against either the strict or loose comparator form
  // later.
  tok('HYPHENRANGE');
  src[t.HYPHENRANGE] = '^\\s*(' + src[t.XRANGEPLAIN] + ')' +
                     '\\s+-\\s+' +
                     '(' + src[t.XRANGEPLAIN] + ')' +
                     '\\s*$';

  tok('HYPHENRANGELOOSE');
  src[t.HYPHENRANGELOOSE] = '^\\s*(' + src[t.XRANGEPLAINLOOSE] + ')' +
                          '\\s+-\\s+' +
                          '(' + src[t.XRANGEPLAINLOOSE] + ')' +
                          '\\s*$';

  // Star ranges basically just allow anything at all.
  tok('STAR');
  src[t.STAR] = '(<|>)?=?\\s*\\*';

  // Compile to actual regexp objects.
  // All are flag-free, unless they were created above with a flag.
  for (var i = 0; i < R; i++) {
    debug(i, src[i]);
    if (!re[i]) {
      re[i] = new RegExp(src[i]);
    }
  }

  exports.parse = parse;
  function parse (version, options) {
    if (!options || typeof options !== 'object') {
      options = {
        loose: !!options,
        includePrerelease: false
      };
    }

    if (version instanceof SemVer) {
      return version
    }

    if (typeof version !== 'string') {
      return null
    }

    if (version.length > MAX_LENGTH) {
      return null
    }

    var r = options.loose ? re[t.LOOSE] : re[t.FULL];
    if (!r.test(version)) {
      return null
    }

    try {
      return new SemVer(version, options)
    } catch (er) {
      return null
    }
  }

  exports.valid = valid;
  function valid (version, options) {
    var v = parse(version, options);
    return v ? v.version : null
  }

  exports.clean = clean;
  function clean (version, options) {
    var s = parse(version.trim().replace(/^[=v]+/, ''), options);
    return s ? s.version : null
  }

  exports.SemVer = SemVer;

  function SemVer (version, options) {
    if (!options || typeof options !== 'object') {
      options = {
        loose: !!options,
        includePrerelease: false
      };
    }
    if (version instanceof SemVer) {
      if (version.loose === options.loose) {
        return version
      } else {
        version = version.version;
      }
    } else if (typeof version !== 'string') {
      throw new TypeError('Invalid Version: ' + version)
    }

    if (version.length > MAX_LENGTH) {
      throw new TypeError('version is longer than ' + MAX_LENGTH + ' characters')
    }

    if (!(this instanceof SemVer)) {
      return new SemVer(version, options)
    }

    debug('SemVer', version, options);
    this.options = options;
    this.loose = !!options.loose;

    var m = version.trim().match(options.loose ? re[t.LOOSE] : re[t.FULL]);

    if (!m) {
      throw new TypeError('Invalid Version: ' + version)
    }

    this.raw = version;

    // these are actually numbers
    this.major = +m[1];
    this.minor = +m[2];
    this.patch = +m[3];

    if (this.major > MAX_SAFE_INTEGER || this.major < 0) {
      throw new TypeError('Invalid major version')
    }

    if (this.minor > MAX_SAFE_INTEGER || this.minor < 0) {
      throw new TypeError('Invalid minor version')
    }

    if (this.patch > MAX_SAFE_INTEGER || this.patch < 0) {
      throw new TypeError('Invalid patch version')
    }

    // numberify any prerelease numeric ids
    if (!m[4]) {
      this.prerelease = [];
    } else {
      this.prerelease = m[4].split('.').map(function (id) {
        if (/^[0-9]+$/.test(id)) {
          var num = +id;
          if (num >= 0 && num < MAX_SAFE_INTEGER) {
            return num
          }
        }
        return id
      });
    }

    this.build = m[5] ? m[5].split('.') : [];
    this.format();
  }

  SemVer.prototype.format = function () {
    this.version = this.major + '.' + this.minor + '.' + this.patch;
    if (this.prerelease.length) {
      this.version += '-' + this.prerelease.join('.');
    }
    return this.version
  };

  SemVer.prototype.toString = function () {
    return this.version
  };

  SemVer.prototype.compare = function (other) {
    debug('SemVer.compare', this.version, this.options, other);
    if (!(other instanceof SemVer)) {
      other = new SemVer(other, this.options);
    }

    return this.compareMain(other) || this.comparePre(other)
  };

  SemVer.prototype.compareMain = function (other) {
    if (!(other instanceof SemVer)) {
      other = new SemVer(other, this.options);
    }

    return compareIdentifiers(this.major, other.major) ||
           compareIdentifiers(this.minor, other.minor) ||
           compareIdentifiers(this.patch, other.patch)
  };

  SemVer.prototype.comparePre = function (other) {
    if (!(other instanceof SemVer)) {
      other = new SemVer(other, this.options);
    }

    // NOT having a prerelease is > having one
    if (this.prerelease.length && !other.prerelease.length) {
      return -1
    } else if (!this.prerelease.length && other.prerelease.length) {
      return 1
    } else if (!this.prerelease.length && !other.prerelease.length) {
      return 0
    }

    var i = 0;
    do {
      var a = this.prerelease[i];
      var b = other.prerelease[i];
      debug('prerelease compare', i, a, b);
      if (a === undefined && b === undefined) {
        return 0
      } else if (b === undefined) {
        return 1
      } else if (a === undefined) {
        return -1
      } else if (a === b) {
        continue
      } else {
        return compareIdentifiers(a, b)
      }
    } while (++i)
  };

  SemVer.prototype.compareBuild = function (other) {
    if (!(other instanceof SemVer)) {
      other = new SemVer(other, this.options);
    }

    var i = 0;
    do {
      var a = this.build[i];
      var b = other.build[i];
      debug('prerelease compare', i, a, b);
      if (a === undefined && b === undefined) {
        return 0
      } else if (b === undefined) {
        return 1
      } else if (a === undefined) {
        return -1
      } else if (a === b) {
        continue
      } else {
        return compareIdentifiers(a, b)
      }
    } while (++i)
  };

  // preminor will bump the version up to the next minor release, and immediately
  // down to pre-release. premajor and prepatch work the same way.
  SemVer.prototype.inc = function (release, identifier) {
    switch (release) {
      case 'premajor':
        this.prerelease.length = 0;
        this.patch = 0;
        this.minor = 0;
        this.major++;
        this.inc('pre', identifier);
        break
      case 'preminor':
        this.prerelease.length = 0;
        this.patch = 0;
        this.minor++;
        this.inc('pre', identifier);
        break
      case 'prepatch':
        // If this is already a prerelease, it will bump to the next version
        // drop any prereleases that might already exist, since they are not
        // relevant at this point.
        this.prerelease.length = 0;
        this.inc('patch', identifier);
        this.inc('pre', identifier);
        break
      // If the input is a non-prerelease version, this acts the same as
      // prepatch.
      case 'prerelease':
        if (this.prerelease.length === 0) {
          this.inc('patch', identifier);
        }
        this.inc('pre', identifier);
        break

      case 'major':
        // If this is a pre-major version, bump up to the same major version.
        // Otherwise increment major.
        // 1.0.0-5 bumps to 1.0.0
        // 1.1.0 bumps to 2.0.0
        if (this.minor !== 0 ||
            this.patch !== 0 ||
            this.prerelease.length === 0) {
          this.major++;
        }
        this.minor = 0;
        this.patch = 0;
        this.prerelease = [];
        break
      case 'minor':
        // If this is a pre-minor version, bump up to the same minor version.
        // Otherwise increment minor.
        // 1.2.0-5 bumps to 1.2.0
        // 1.2.1 bumps to 1.3.0
        if (this.patch !== 0 || this.prerelease.length === 0) {
          this.minor++;
        }
        this.patch = 0;
        this.prerelease = [];
        break
      case 'patch':
        // If this is not a pre-release version, it will increment the patch.
        // If it is a pre-release it will bump up to the same patch version.
        // 1.2.0-5 patches to 1.2.0
        // 1.2.0 patches to 1.2.1
        if (this.prerelease.length === 0) {
          this.patch++;
        }
        this.prerelease = [];
        break
      // This probably shouldn't be used publicly.
      // 1.0.0 "pre" would become 1.0.0-0 which is the wrong direction.
      case 'pre':
        if (this.prerelease.length === 0) {
          this.prerelease = [0];
        } else {
          var i = this.prerelease.length;
          while (--i >= 0) {
            if (typeof this.prerelease[i] === 'number') {
              this.prerelease[i]++;
              i = -2;
            }
          }
          if (i === -1) {
            // didn't increment anything
            this.prerelease.push(0);
          }
        }
        if (identifier) {
          // 1.2.0-beta.1 bumps to 1.2.0-beta.2,
          // 1.2.0-beta.fooblz or 1.2.0-beta bumps to 1.2.0-beta.0
          if (this.prerelease[0] === identifier) {
            if (isNaN(this.prerelease[1])) {
              this.prerelease = [identifier, 0];
            }
          } else {
            this.prerelease = [identifier, 0];
          }
        }
        break

      default:
        throw new Error('invalid increment argument: ' + release)
    }
    this.format();
    this.raw = this.version;
    return this
  };

  exports.inc = inc;
  function inc (version, release, loose, identifier) {
    if (typeof (loose) === 'string') {
      identifier = loose;
      loose = undefined;
    }

    try {
      return new SemVer(version, loose).inc(release, identifier).version
    } catch (er) {
      return null
    }
  }

  exports.diff = diff;
  function diff (version1, version2) {
    if (eq(version1, version2)) {
      return null
    } else {
      var v1 = parse(version1);
      var v2 = parse(version2);
      var prefix = '';
      if (v1.prerelease.length || v2.prerelease.length) {
        prefix = 'pre';
        var defaultResult = 'prerelease';
      }
      for (var key in v1) {
        if (key === 'major' || key === 'minor' || key === 'patch') {
          if (v1[key] !== v2[key]) {
            return prefix + key
          }
        }
      }
      return defaultResult // may be undefined
    }
  }

  exports.compareIdentifiers = compareIdentifiers;

  var numeric = /^[0-9]+$/;
  function compareIdentifiers (a, b) {
    var anum = numeric.test(a);
    var bnum = numeric.test(b);

    if (anum && bnum) {
      a = +a;
      b = +b;
    }

    return a === b ? 0
      : (anum && !bnum) ? -1
      : (bnum && !anum) ? 1
      : a < b ? -1
      : 1
  }

  exports.rcompareIdentifiers = rcompareIdentifiers;
  function rcompareIdentifiers (a, b) {
    return compareIdentifiers(b, a)
  }

  exports.major = major;
  function major (a, loose) {
    return new SemVer(a, loose).major
  }

  exports.minor = minor;
  function minor (a, loose) {
    return new SemVer(a, loose).minor
  }

  exports.patch = patch;
  function patch (a, loose) {
    return new SemVer(a, loose).patch
  }

  exports.compare = compare;
  function compare (a, b, loose) {
    return new SemVer(a, loose).compare(new SemVer(b, loose))
  }

  exports.compareLoose = compareLoose;
  function compareLoose (a, b) {
    return compare(a, b, true)
  }

  exports.compareBuild = compareBuild;
  function compareBuild (a, b, loose) {
    var versionA = new SemVer(a, loose);
    var versionB = new SemVer(b, loose);
    return versionA.compare(versionB) || versionA.compareBuild(versionB)
  }

  exports.rcompare = rcompare;
  function rcompare (a, b, loose) {
    return compare(b, a, loose)
  }

  exports.sort = sort;
  function sort (list, loose) {
    return list.sort(function (a, b) {
      return exports.compareBuild(a, b, loose)
    })
  }

  exports.rsort = rsort;
  function rsort (list, loose) {
    return list.sort(function (a, b) {
      return exports.compareBuild(b, a, loose)
    })
  }

  exports.gt = gt;
  function gt (a, b, loose) {
    return compare(a, b, loose) > 0
  }

  exports.lt = lt;
  function lt (a, b, loose) {
    return compare(a, b, loose) < 0
  }

  exports.eq = eq;
  function eq (a, b, loose) {
    return compare(a, b, loose) === 0
  }

  exports.neq = neq;
  function neq (a, b, loose) {
    return compare(a, b, loose) !== 0
  }

  exports.gte = gte;
  function gte (a, b, loose) {
    return compare(a, b, loose) >= 0
  }

  exports.lte = lte;
  function lte (a, b, loose) {
    return compare(a, b, loose) <= 0
  }

  exports.cmp = cmp;
  function cmp (a, op, b, loose) {
    switch (op) {
      case '===':
        if (typeof a === 'object')
          { a = a.version; }
        if (typeof b === 'object')
          { b = b.version; }
        return a === b

      case '!==':
        if (typeof a === 'object')
          { a = a.version; }
        if (typeof b === 'object')
          { b = b.version; }
        return a !== b

      case '':
      case '=':
      case '==':
        return eq(a, b, loose)

      case '!=':
        return neq(a, b, loose)

      case '>':
        return gt(a, b, loose)

      case '>=':
        return gte(a, b, loose)

      case '<':
        return lt(a, b, loose)

      case '<=':
        return lte(a, b, loose)

      default:
        throw new TypeError('Invalid operator: ' + op)
    }
  }

  exports.Comparator = Comparator;
  function Comparator (comp, options) {
    if (!options || typeof options !== 'object') {
      options = {
        loose: !!options,
        includePrerelease: false
      };
    }

    if (comp instanceof Comparator) {
      if (comp.loose === !!options.loose) {
        return comp
      } else {
        comp = comp.value;
      }
    }

    if (!(this instanceof Comparator)) {
      return new Comparator(comp, options)
    }

    debug('comparator', comp, options);
    this.options = options;
    this.loose = !!options.loose;
    this.parse(comp);

    if (this.semver === ANY) {
      this.value = '';
    } else {
      this.value = this.operator + this.semver.version;
    }

    debug('comp', this);
  }

  var ANY = {};
  Comparator.prototype.parse = function (comp) {
    var r = this.options.loose ? re[t.COMPARATORLOOSE] : re[t.COMPARATOR];
    var m = comp.match(r);

    if (!m) {
      throw new TypeError('Invalid comparator: ' + comp)
    }

    this.operator = m[1] !== undefined ? m[1] : '';
    if (this.operator === '=') {
      this.operator = '';
    }

    // if it literally is just '>' or '' then allow anything.
    if (!m[2]) {
      this.semver = ANY;
    } else {
      this.semver = new SemVer(m[2], this.options.loose);
    }
  };

  Comparator.prototype.toString = function () {
    return this.value
  };

  Comparator.prototype.test = function (version) {
    debug('Comparator.test', version, this.options.loose);

    if (this.semver === ANY || version === ANY) {
      return true
    }

    if (typeof version === 'string') {
      try {
        version = new SemVer(version, this.options);
      } catch (er) {
        return false
      }
    }

    return cmp(version, this.operator, this.semver, this.options)
  };

  Comparator.prototype.intersects = function (comp, options) {
    if (!(comp instanceof Comparator)) {
      throw new TypeError('a Comparator is required')
    }

    if (!options || typeof options !== 'object') {
      options = {
        loose: !!options,
        includePrerelease: false
      };
    }

    var rangeTmp;

    if (this.operator === '') {
      if (this.value === '') {
        return true
      }
      rangeTmp = new Range(comp.value, options);
      return satisfies(this.value, rangeTmp, options)
    } else if (comp.operator === '') {
      if (comp.value === '') {
        return true
      }
      rangeTmp = new Range(this.value, options);
      return satisfies(comp.semver, rangeTmp, options)
    }

    var sameDirectionIncreasing =
      (this.operator === '>=' || this.operator === '>') &&
      (comp.operator === '>=' || comp.operator === '>');
    var sameDirectionDecreasing =
      (this.operator === '<=' || this.operator === '<') &&
      (comp.operator === '<=' || comp.operator === '<');
    var sameSemVer = this.semver.version === comp.semver.version;
    var differentDirectionsInclusive =
      (this.operator === '>=' || this.operator === '<=') &&
      (comp.operator === '>=' || comp.operator === '<=');
    var oppositeDirectionsLessThan =
      cmp(this.semver, '<', comp.semver, options) &&
      ((this.operator === '>=' || this.operator === '>') &&
      (comp.operator === '<=' || comp.operator === '<'));
    var oppositeDirectionsGreaterThan =
      cmp(this.semver, '>', comp.semver, options) &&
      ((this.operator === '<=' || this.operator === '<') &&
      (comp.operator === '>=' || comp.operator === '>'));

    return sameDirectionIncreasing || sameDirectionDecreasing ||
      (sameSemVer && differentDirectionsInclusive) ||
      oppositeDirectionsLessThan || oppositeDirectionsGreaterThan
  };

  exports.Range = Range;
  function Range (range, options) {
    if (!options || typeof options !== 'object') {
      options = {
        loose: !!options,
        includePrerelease: false
      };
    }

    if (range instanceof Range) {
      if (range.loose === !!options.loose &&
          range.includePrerelease === !!options.includePrerelease) {
        return range
      } else {
        return new Range(range.raw, options)
      }
    }

    if (range instanceof Comparator) {
      return new Range(range.value, options)
    }

    if (!(this instanceof Range)) {
      return new Range(range, options)
    }

    this.options = options;
    this.loose = !!options.loose;
    this.includePrerelease = !!options.includePrerelease;

    // First, split based on boolean or ||
    this.raw = range;
    this.set = range.split(/\s*\|\|\s*/).map(function (range) {
      return this.parseRange(range.trim())
    }, this).filter(function (c) {
      // throw out any that are not relevant for whatever reason
      return c.length
    });

    if (!this.set.length) {
      throw new TypeError('Invalid SemVer Range: ' + range)
    }

    this.format();
  }

  Range.prototype.format = function () {
    this.range = this.set.map(function (comps) {
      return comps.join(' ').trim()
    }).join('||').trim();
    return this.range
  };

  Range.prototype.toString = function () {
    return this.range
  };

  Range.prototype.parseRange = function (range) {
    var loose = this.options.loose;
    range = range.trim();
    // `1.2.3 - 1.2.4` => `>=1.2.3 <=1.2.4`
    var hr = loose ? re[t.HYPHENRANGELOOSE] : re[t.HYPHENRANGE];
    range = range.replace(hr, hyphenReplace);
    debug('hyphen replace', range);
    // `> 1.2.3 < 1.2.5` => `>1.2.3 <1.2.5`
    range = range.replace(re[t.COMPARATORTRIM], comparatorTrimReplace);
    debug('comparator trim', range, re[t.COMPARATORTRIM]);

    // `~ 1.2.3` => `~1.2.3`
    range = range.replace(re[t.TILDETRIM], tildeTrimReplace);

    // `^ 1.2.3` => `^1.2.3`
    range = range.replace(re[t.CARETTRIM], caretTrimReplace);

    // normalize spaces
    range = range.split(/\s+/).join(' ');

    // At this point, the range is completely trimmed and
    // ready to be split into comparators.

    var compRe = loose ? re[t.COMPARATORLOOSE] : re[t.COMPARATOR];
    var set = range.split(' ').map(function (comp) {
      return parseComparator(comp, this.options)
    }, this).join(' ').split(/\s+/);
    if (this.options.loose) {
      // in loose mode, throw out any that are not valid comparators
      set = set.filter(function (comp) {
        return !!comp.match(compRe)
      });
    }
    set = set.map(function (comp) {
      return new Comparator(comp, this.options)
    }, this);

    return set
  };

  Range.prototype.intersects = function (range, options) {
    if (!(range instanceof Range)) {
      throw new TypeError('a Range is required')
    }

    return this.set.some(function (thisComparators) {
      return (
        isSatisfiable(thisComparators, options) &&
        range.set.some(function (rangeComparators) {
          return (
            isSatisfiable(rangeComparators, options) &&
            thisComparators.every(function (thisComparator) {
              return rangeComparators.every(function (rangeComparator) {
                return thisComparator.intersects(rangeComparator, options)
              })
            })
          )
        })
      )
    })
  };

  // take a set of comparators and determine whether there
  // exists a version which can satisfy it
  function isSatisfiable (comparators, options) {
    var result = true;
    var remainingComparators = comparators.slice();
    var testComparator = remainingComparators.pop();

    while (result && remainingComparators.length) {
      result = remainingComparators.every(function (otherComparator) {
        return testComparator.intersects(otherComparator, options)
      });

      testComparator = remainingComparators.pop();
    }

    return result
  }

  // Mostly just for testing and legacy API reasons
  exports.toComparators = toComparators;
  function toComparators (range, options) {
    return new Range(range, options).set.map(function (comp) {
      return comp.map(function (c) {
        return c.value
      }).join(' ').trim().split(' ')
    })
  }

  // comprised of xranges, tildes, stars, and gtlt's at this point.
  // already replaced the hyphen ranges
  // turn into a set of JUST comparators.
  function parseComparator (comp, options) {
    debug('comp', comp, options);
    comp = replaceCarets(comp, options);
    debug('caret', comp);
    comp = replaceTildes(comp, options);
    debug('tildes', comp);
    comp = replaceXRanges(comp, options);
    debug('xrange', comp);
    comp = replaceStars(comp, options);
    debug('stars', comp);
    return comp
  }

  function isX (id) {
    return !id || id.toLowerCase() === 'x' || id === '*'
  }

  // ~, ~> --> * (any, kinda silly)
  // ~2, ~2.x, ~2.x.x, ~>2, ~>2.x ~>2.x.x --> >=2.0.0 <3.0.0
  // ~2.0, ~2.0.x, ~>2.0, ~>2.0.x --> >=2.0.0 <2.1.0
  // ~1.2, ~1.2.x, ~>1.2, ~>1.2.x --> >=1.2.0 <1.3.0
  // ~1.2.3, ~>1.2.3 --> >=1.2.3 <1.3.0
  // ~1.2.0, ~>1.2.0 --> >=1.2.0 <1.3.0
  function replaceTildes (comp, options) {
    return comp.trim().split(/\s+/).map(function (comp) {
      return replaceTilde(comp, options)
    }).join(' ')
  }

  function replaceTilde (comp, options) {
    var r = options.loose ? re[t.TILDELOOSE] : re[t.TILDE];
    return comp.replace(r, function (_, M, m, p, pr) {
      debug('tilde', comp, _, M, m, p, pr);
      var ret;

      if (isX(M)) {
        ret = '';
      } else if (isX(m)) {
        ret = '>=' + M + '.0.0 <' + (+M + 1) + '.0.0';
      } else if (isX(p)) {
        // ~1.2 == >=1.2.0 <1.3.0
        ret = '>=' + M + '.' + m + '.0 <' + M + '.' + (+m + 1) + '.0';
      } else if (pr) {
        debug('replaceTilde pr', pr);
        ret = '>=' + M + '.' + m + '.' + p + '-' + pr +
              ' <' + M + '.' + (+m + 1) + '.0';
      } else {
        // ~1.2.3 == >=1.2.3 <1.3.0
        ret = '>=' + M + '.' + m + '.' + p +
              ' <' + M + '.' + (+m + 1) + '.0';
      }

      debug('tilde return', ret);
      return ret
    })
  }

  // ^ --> * (any, kinda silly)
  // ^2, ^2.x, ^2.x.x --> >=2.0.0 <3.0.0
  // ^2.0, ^2.0.x --> >=2.0.0 <3.0.0
  // ^1.2, ^1.2.x --> >=1.2.0 <2.0.0
  // ^1.2.3 --> >=1.2.3 <2.0.0
  // ^1.2.0 --> >=1.2.0 <2.0.0
  function replaceCarets (comp, options) {
    return comp.trim().split(/\s+/).map(function (comp) {
      return replaceCaret(comp, options)
    }).join(' ')
  }

  function replaceCaret (comp, options) {
    debug('caret', comp, options);
    var r = options.loose ? re[t.CARETLOOSE] : re[t.CARET];
    return comp.replace(r, function (_, M, m, p, pr) {
      debug('caret', comp, _, M, m, p, pr);
      var ret;

      if (isX(M)) {
        ret = '';
      } else if (isX(m)) {
        ret = '>=' + M + '.0.0 <' + (+M + 1) + '.0.0';
      } else if (isX(p)) {
        if (M === '0') {
          ret = '>=' + M + '.' + m + '.0 <' + M + '.' + (+m + 1) + '.0';
        } else {
          ret = '>=' + M + '.' + m + '.0 <' + (+M + 1) + '.0.0';
        }
      } else if (pr) {
        debug('replaceCaret pr', pr);
        if (M === '0') {
          if (m === '0') {
            ret = '>=' + M + '.' + m + '.' + p + '-' + pr +
                  ' <' + M + '.' + m + '.' + (+p + 1);
          } else {
            ret = '>=' + M + '.' + m + '.' + p + '-' + pr +
                  ' <' + M + '.' + (+m + 1) + '.0';
          }
        } else {
          ret = '>=' + M + '.' + m + '.' + p + '-' + pr +
                ' <' + (+M + 1) + '.0.0';
        }
      } else {
        debug('no pr');
        if (M === '0') {
          if (m === '0') {
            ret = '>=' + M + '.' + m + '.' + p +
                  ' <' + M + '.' + m + '.' + (+p + 1);
          } else {
            ret = '>=' + M + '.' + m + '.' + p +
                  ' <' + M + '.' + (+m + 1) + '.0';
          }
        } else {
          ret = '>=' + M + '.' + m + '.' + p +
                ' <' + (+M + 1) + '.0.0';
        }
      }

      debug('caret return', ret);
      return ret
    })
  }

  function replaceXRanges (comp, options) {
    debug('replaceXRanges', comp, options);
    return comp.split(/\s+/).map(function (comp) {
      return replaceXRange(comp, options)
    }).join(' ')
  }

  function replaceXRange (comp, options) {
    comp = comp.trim();
    var r = options.loose ? re[t.XRANGELOOSE] : re[t.XRANGE];
    return comp.replace(r, function (ret, gtlt, M, m, p, pr) {
      debug('xRange', comp, ret, gtlt, M, m, p, pr);
      var xM = isX(M);
      var xm = xM || isX(m);
      var xp = xm || isX(p);
      var anyX = xp;

      if (gtlt === '=' && anyX) {
        gtlt = '';
      }

      // if we're including prereleases in the match, then we need
      // to fix this to -0, the lowest possible prerelease value
      pr = options.includePrerelease ? '-0' : '';

      if (xM) {
        if (gtlt === '>' || gtlt === '<') {
          // nothing is allowed
          ret = '<0.0.0-0';
        } else {
          // nothing is forbidden
          ret = '*';
        }
      } else if (gtlt && anyX) {
        // we know patch is an x, because we have any x at all.
        // replace X with 0
        if (xm) {
          m = 0;
        }
        p = 0;

        if (gtlt === '>') {
          // >1 => >=2.0.0
          // >1.2 => >=1.3.0
          // >1.2.3 => >= 1.2.4
          gtlt = '>=';
          if (xm) {
            M = +M + 1;
            m = 0;
            p = 0;
          } else {
            m = +m + 1;
            p = 0;
          }
        } else if (gtlt === '<=') {
          // <=0.7.x is actually <0.8.0, since any 0.7.x should
          // pass.  Similarly, <=7.x is actually <8.0.0, etc.
          gtlt = '<';
          if (xm) {
            M = +M + 1;
          } else {
            m = +m + 1;
          }
        }

        ret = gtlt + M + '.' + m + '.' + p + pr;
      } else if (xm) {
        ret = '>=' + M + '.0.0' + pr + ' <' + (+M + 1) + '.0.0' + pr;
      } else if (xp) {
        ret = '>=' + M + '.' + m + '.0' + pr +
          ' <' + M + '.' + (+m + 1) + '.0' + pr;
      }

      debug('xRange return', ret);

      return ret
    })
  }

  // Because * is AND-ed with everything else in the comparator,
  // and '' means "any version", just remove the *s entirely.
  function replaceStars (comp, options) {
    debug('replaceStars', comp, options);
    // Looseness is ignored here.  star is always as loose as it gets!
    return comp.trim().replace(re[t.STAR], '')
  }

  // This function is passed to string.replace(re[t.HYPHENRANGE])
  // M, m, patch, prerelease, build
  // 1.2 - 3.4.5 => >=1.2.0 <=3.4.5
  // 1.2.3 - 3.4 => >=1.2.0 <3.5.0 Any 3.4.x will do
  // 1.2 - 3.4 => >=1.2.0 <3.5.0
  function hyphenReplace ($0,
    from, fM, fm, fp, fpr, fb,
    to, tM, tm, tp, tpr, tb) {
    if (isX(fM)) {
      from = '';
    } else if (isX(fm)) {
      from = '>=' + fM + '.0.0';
    } else if (isX(fp)) {
      from = '>=' + fM + '.' + fm + '.0';
    } else {
      from = '>=' + from;
    }

    if (isX(tM)) {
      to = '';
    } else if (isX(tm)) {
      to = '<' + (+tM + 1) + '.0.0';
    } else if (isX(tp)) {
      to = '<' + tM + '.' + (+tm + 1) + '.0';
    } else if (tpr) {
      to = '<=' + tM + '.' + tm + '.' + tp + '-' + tpr;
    } else {
      to = '<=' + to;
    }

    return (from + ' ' + to).trim()
  }

  // if ANY of the sets match ALL of its comparators, then pass
  Range.prototype.test = function (version) {
    if (!version) {
      return false
    }

    if (typeof version === 'string') {
      try {
        version = new SemVer(version, this.options);
      } catch (er) {
        return false
      }
    }

    for (var i = 0; i < this.set.length; i++) {
      if (testSet(this.set[i], version, this.options)) {
        return true
      }
    }
    return false
  };

  function testSet (set, version, options) {
    for (var i = 0; i < set.length; i++) {
      if (!set[i].test(version)) {
        return false
      }
    }

    if (version.prerelease.length && !options.includePrerelease) {
      // Find the set of versions that are allowed to have prereleases
      // For example, ^1.2.3-pr.1 desugars to >=1.2.3-pr.1 <2.0.0
      // That should allow `1.2.3-pr.2` to pass.
      // However, `1.2.4-alpha.notready` should NOT be allowed,
      // even though it's within the range set by the comparators.
      for (i = 0; i < set.length; i++) {
        debug(set[i].semver);
        if (set[i].semver === ANY) {
          continue
        }

        if (set[i].semver.prerelease.length > 0) {
          var allowed = set[i].semver;
          if (allowed.major === version.major &&
              allowed.minor === version.minor &&
              allowed.patch === version.patch) {
            return true
          }
        }
      }

      // Version has a -pre, but it's not one of the ones we like.
      return false
    }

    return true
  }

  exports.satisfies = satisfies;
  function satisfies (version, range, options) {
    try {
      range = new Range(range, options);
    } catch (er) {
      return false
    }
    return range.test(version)
  }

  exports.maxSatisfying = maxSatisfying;
  function maxSatisfying (versions, range, options) {
    var max = null;
    var maxSV = null;
    try {
      var rangeObj = new Range(range, options);
    } catch (er) {
      return null
    }
    versions.forEach(function (v) {
      if (rangeObj.test(v)) {
        // satisfies(v, range, options)
        if (!max || maxSV.compare(v) === -1) {
          // compare(max, v, true)
          max = v;
          maxSV = new SemVer(max, options);
        }
      }
    });
    return max
  }

  exports.minSatisfying = minSatisfying;
  function minSatisfying (versions, range, options) {
    var min = null;
    var minSV = null;
    try {
      var rangeObj = new Range(range, options);
    } catch (er) {
      return null
    }
    versions.forEach(function (v) {
      if (rangeObj.test(v)) {
        // satisfies(v, range, options)
        if (!min || minSV.compare(v) === 1) {
          // compare(min, v, true)
          min = v;
          minSV = new SemVer(min, options);
        }
      }
    });
    return min
  }

  exports.minVersion = minVersion;
  function minVersion (range, loose) {
    range = new Range(range, loose);

    var minver = new SemVer('0.0.0');
    if (range.test(minver)) {
      return minver
    }

    minver = new SemVer('0.0.0-0');
    if (range.test(minver)) {
      return minver
    }

    minver = null;
    for (var i = 0; i < range.set.length; ++i) {
      var comparators = range.set[i];

      comparators.forEach(function (comparator) {
        // Clone to avoid manipulating the comparator's semver object.
        var compver = new SemVer(comparator.semver.version);
        switch (comparator.operator) {
          case '>':
            if (compver.prerelease.length === 0) {
              compver.patch++;
            } else {
              compver.prerelease.push(0);
            }
            compver.raw = compver.format();
            /* fallthrough */
          case '':
          case '>=':
            if (!minver || gt(minver, compver)) {
              minver = compver;
            }
            break
          case '<':
          case '<=':
            /* Ignore maximum versions */
            break
          /* istanbul ignore next */
          default:
            throw new Error('Unexpected operation: ' + comparator.operator)
        }
      });
    }

    if (minver && range.test(minver)) {
      return minver
    }

    return null
  }

  exports.validRange = validRange;
  function validRange (range, options) {
    try {
      // Return '*' instead of '' so that truthiness works.
      // This will throw if it's invalid anyway
      return new Range(range, options).range || '*'
    } catch (er) {
      return null
    }
  }

  // Determine if version is less than all the versions possible in the range
  exports.ltr = ltr;
  function ltr (version, range, options) {
    return outside(version, range, '<', options)
  }

  // Determine if version is greater than all the versions possible in the range.
  exports.gtr = gtr;
  function gtr (version, range, options) {
    return outside(version, range, '>', options)
  }

  exports.outside = outside;
  function outside (version, range, hilo, options) {
    version = new SemVer(version, options);
    range = new Range(range, options);

    var gtfn, ltefn, ltfn, comp, ecomp;
    switch (hilo) {
      case '>':
        gtfn = gt;
        ltefn = lte;
        ltfn = lt;
        comp = '>';
        ecomp = '>=';
        break
      case '<':
        gtfn = lt;
        ltefn = gte;
        ltfn = gt;
        comp = '<';
        ecomp = '<=';
        break
      default:
        throw new TypeError('Must provide a hilo val of "<" or ">"')
    }

    // If it satisifes the range it is not outside
    if (satisfies(version, range, options)) {
      return false
    }

    // From now on, variable terms are as if we're in "gtr" mode.
    // but note that everything is flipped for the "ltr" function.

    for (var i = 0; i < range.set.length; ++i) {
      var comparators = range.set[i];

      var high = null;
      var low = null;

      comparators.forEach(function (comparator) {
        if (comparator.semver === ANY) {
          comparator = new Comparator('>=0.0.0');
        }
        high = high || comparator;
        low = low || comparator;
        if (gtfn(comparator.semver, high.semver, options)) {
          high = comparator;
        } else if (ltfn(comparator.semver, low.semver, options)) {
          low = comparator;
        }
      });

      // If the edge version comparator has a operator then our version
      // isn't outside it
      if (high.operator === comp || high.operator === ecomp) {
        return false
      }

      // If the lowest version comparator has an operator and our version
      // is less than it then it isn't higher than the range
      if ((!low.operator || low.operator === comp) &&
          ltefn(version, low.semver)) {
        return false
      } else if (low.operator === ecomp && ltfn(version, low.semver)) {
        return false
      }
    }
    return true
  }

  exports.prerelease = prerelease;
  function prerelease (version, options) {
    var parsed = parse(version, options);
    return (parsed && parsed.prerelease.length) ? parsed.prerelease : null
  }

  exports.intersects = intersects;
  function intersects (r1, r2, options) {
    r1 = new Range(r1, options);
    r2 = new Range(r2, options);
    return r1.intersects(r2)
  }

  exports.coerce = coerce;
  function coerce (version, options) {
    if (version instanceof SemVer) {
      return version
    }

    if (typeof version === 'number') {
      version = String(version);
    }

    if (typeof version !== 'string') {
      return null
    }

    options = options || {};

    var match = null;
    if (!options.rtl) {
      match = version.match(re[t.COERCE]);
    } else {
      // Find the right-most coercible string that does not share
      // a terminus with a more left-ward coercible string.
      // Eg, '1.2.3.4' wants to coerce '2.3.4', not '3.4' or '4'
      //
      // Walk through the string checking with a /g regexp
      // Manually set the index so as to pick up overlapping matches.
      // Stop when we get a match that ends at the string end, since no
      // coercible string can be more right-ward without the same terminus.
      var next;
      while ((next = re[t.COERCERTL].exec(version)) &&
        (!match || match.index + match[0].length !== version.length)
      ) {
        if (!match ||
            next.index + next[0].length !== match.index + match[0].length) {
          match = next;
        }
        re[t.COERCERTL].lastIndex = next.index + next[1].length + next[2].length;
      }
      // leave it in a clean state
      re[t.COERCERTL].lastIndex = -1;
    }

    if (match === null) {
      return null
    }

    return parse(match[2] +
      '.' + (match[3] || '0') +
      '.' + (match[4] || '0'), options)
  }
  });

  var NAME_SELECTOR = 'NAME_SELECTOR';
  var COMPONENT_SELECTOR = 'COMPONENT_SELECTOR';
  var REF_SELECTOR = 'REF_SELECTOR';
  var DOM_SELECTOR = 'DOM_SELECTOR';
  var INVALID_SELECTOR = 'INVALID_SELECTOR';

  var VUE_VERSION = Number(
    ((Vue__default['default'].version.split('.')[0]) + "." + (Vue__default['default'].version.split('.')[1]))
  );

  var FUNCTIONAL_OPTIONS =
    VUE_VERSION >= 2.5 ? 'fnOptions' : 'functionalOptions';

  var BEFORE_RENDER_LIFECYCLE_HOOK = semver.gt(Vue__default['default'].version, '2.1.8')
    ? 'beforeCreate'
    : 'beforeMount';

  var CREATE_ELEMENT_ALIAS = semver.gt(Vue__default['default'].version, '2.1.5')
    ? '_c'
    : '_h';

  // 

  function throwError(msg) {
    throw new Error(("[vue-test-utils]: " + msg))
  }

  function warn(msg) {
    console.error(("[vue-test-utils]: " + msg));
  }

  var camelizeRE = /-(\w)/g;

  var camelize = function (str) {
    var camelizedStr = str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; }
    );
    return camelizedStr.charAt(0).toLowerCase() + camelizedStr.slice(1)
  };

  /**
   * Capitalize a string.
   */
  var capitalize = function (str) { return str.charAt(0).toUpperCase() + str.slice(1); };

  /**
   * Hyphenate a camelCase string.
   */
  var hyphenateRE = /\B([A-Z])/g;
  var hyphenate = function (str) { return str.replace(hyphenateRE, '-$1').toLowerCase(); };

  function hasOwnProperty(obj, prop) {
    return Object.prototype.hasOwnProperty.call(obj, prop)
  }

  function keys(obj) {
    // $FlowIgnore
    return Object.keys(obj)
  }

  function resolveComponent(id, components) {
    if (typeof id !== 'string') {
      return
    }
    // check local registration variations first
    if (hasOwnProperty(components, id)) {
      return components[id]
    }
    var camelizedId = camelize(id);
    if (hasOwnProperty(components, camelizedId)) {
      return components[camelizedId]
    }
    var PascalCaseId = capitalize(camelizedId);
    if (hasOwnProperty(components, PascalCaseId)) {
      return components[PascalCaseId]
    }
    // fallback to prototype chain
    return components[id] || components[camelizedId] || components[PascalCaseId]
  }

  var UA =
    typeof window !== 'undefined' &&
    'navigator' in window &&
    navigator.userAgent.toLowerCase();

  var isPhantomJS = UA && UA.includes && UA.match(/phantomjs/i);

  var isEdge = UA && UA.indexOf('edge/') > 0;
  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;

  // get the event used to trigger v-model handler that updates bound data
  function getCheckedEvent() {
    var version = Vue__default['default'].version;

    if (semver.satisfies(version, '2.1.9 - 2.1.10')) {
      return 'click'
    }

    if (semver.satisfies(version, '2.2 - 2.4')) {
      return isChrome ? 'click' : 'change'
    }

    // change is handler for version 2.0 - 2.1.8, and 2.5+
    return 'change'
  }

  /**
   * Normalize nextTick to return a promise for all Vue 2 versions.
   * Vue < 2.1 does not return a Promise from nextTick
   * @return {Promise<R>}
   */
  function nextTick() {
    if (VUE_VERSION > 2) { return Vue__default['default'].nextTick() }
    return new Promise(function (resolve) {
      Vue__default['default'].nextTick(resolve);
    })
  }

  function warnDeprecated(method, fallback) {
    if ( fallback === void 0 ) fallback = '';

    if (!config.showDeprecationWarnings) { return }
    var msg = method + " is deprecated and will be removed in the next major version.";
    if (fallback) { msg += " " + fallback + "."; }
    if (config.deprecationWarningHandler) {
      config.deprecationWarningHandler(method, msg);
    } else {
      warn(msg);
    }
  }

  function isVueWrapper(wrapper) {
    return wrapper.vm || wrapper.isFunctionalComponent
  }

  // 

  function addMocks(
    _Vue,
    mockedProperties
  ) {
    if ( mockedProperties === void 0 ) mockedProperties = {};

    if (mockedProperties === false) {
      return
    }
    Object.keys(mockedProperties).forEach(function (key) {
      try {
        // $FlowIgnore
        _Vue.prototype[key] = mockedProperties[key];
      } catch (e) {
        warn(
          "could not overwrite property " + key + ", this is " +
            "usually caused by a plugin that has added " +
            "the property as a read-only value"
        );
      }
      // $FlowIgnore
      Vue__default['default'].util.defineReactive(_Vue, key, mockedProperties[key]);
    });
  }

  // 

  function logEvents(
    vm,
    emitted,
    emittedByOrder
  ) {
    var emit = vm.$emit;
    vm.$emit = function (name) {
      var args = [], len = arguments.length - 1;
      while ( len-- > 0 ) args[ len ] = arguments[ len + 1 ];
  (emitted[name] || (emitted[name] = [])).push(args);
      emittedByOrder.push({ name: name, args: args });
      return emit.call.apply(emit, [ vm, name ].concat( args ))
    };
  }

  function addEventLogger(_Vue) {
    _Vue.mixin({
      beforeCreate: function() {
        this.__emitted = Object.create(null);
        this.__emittedByOrder = [];
        logEvents(this, this.__emitted, this.__emittedByOrder);
      }
    });
  }

  function addStubs(_Vue, stubComponents) {
    var obj;

    function addStubComponentsMixin() {
      Object.assign(this.$options.components, stubComponents);
    }

    _Vue.mixin(( obj = {}, obj[BEFORE_RENDER_LIFECYCLE_HOOK] = addStubComponentsMixin, obj ));
  }

  // 

  function isDomSelector(selector) {
    if (typeof selector !== 'string') {
      return false
    }

    try {
      if (typeof document === 'undefined') {
        throwError(
          "mount must be run in a browser environment like " +
            "PhantomJS, jsdom or chrome"
        );
      }
    } catch (error) {
      throwError(
        "mount must be run in a browser environment like " +
          "PhantomJS, jsdom or chrome"
      );
    }

    try {
      document.querySelector(selector);
      return true
    } catch (error$1) {
      return false
    }
  }

  function isVueComponent(c) {
    if (isConstructor(c)) {
      return true
    }

    if (c === null || typeof c !== 'object') {
      return false
    }

    if (c.extends || c._Ctor) {
      return true
    }

    if (typeof c.template === 'string') {
      return true
    }

    if (typeof c.setup === 'function' && !c.render) {
      return true
    }

    return typeof c.render === 'function'
  }

  function componentNeedsCompiling(component) {
    return (
      component &&
      !component.render &&
      (component.template || component.extends || component.extendOptions) &&
      !component.functional
    )
  }

  function isRefSelector(refOptionsObject) {
    if (
      typeof refOptionsObject !== 'object' ||
      Object.keys(refOptionsObject || {}).length !== 1
    ) {
      return false
    }

    return typeof refOptionsObject.ref === 'string'
  }

  function isNameSelector(nameOptionsObject) {
    if (typeof nameOptionsObject !== 'object' || nameOptionsObject === null) {
      return false
    }

    return !!nameOptionsObject.name
  }

  function isConstructor(c) {
    return typeof c === 'function' && c.cid
  }

  function isDynamicComponent(c) {
    return typeof c === 'function' && !c.cid
  }

  function isComponentOptions(c) {
    return c !== null && typeof c === 'object' && (c.template || c.render)
  }

  function isFunctionalComponent(c) {
    if (!isVueComponent(c)) {
      return false
    }
    if (isConstructor(c)) {
      return c.options.functional
    }
    return c.functional
  }

  function templateContainsComponent(
    template,
    name
  ) {
    return [capitalize, camelize, hyphenate].some(function (format) {
      var re = new RegExp(("<" + (format(name)) + "\\s*(\\s|>|(/>))"), 'g');
      return re.test(template)
    })
  }

  function isPlainObject(c) {
    return Object.prototype.toString.call(c) === '[object Object]'
  }

  function isHTMLElement(c) {
    if (typeof HTMLElement === 'undefined') {
      return false
    }
    // eslint-disable-next-line no-undef
    return c instanceof HTMLElement
  }

  function makeMap(str, expectsLowerCase) {
    var map = Object.create(null);
    var list = str.split(',');
    for (var i = 0; i < list.length; i++) {
      map[list[i]] = true;
    }
    return expectsLowerCase
      ? function(val) {
          return map[val.toLowerCase()]
        }
      : function(val) {
          return map[val]
        }
  }

  var isHTMLTag = makeMap(
    'html,body,base,head,link,meta,style,title,' +
      'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
      'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
      'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
      's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,' +
      'embed,object,param,source,canvas,script,noscript,del,ins,' +
      'caption,col,colgroup,table,thead,tbody,td,th,tr,video,' +
      'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
      'output,progress,select,textarea,' +
      'details,dialog,menu,menuitem,summary,' +
      'content,element,shadow,template,blockquote,iframe,tfoot'
  );

  // this map is intentionally selective, only covering SVG elements that may
  // contain child elements.
  var isSVG = makeMap(
    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
      'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
      'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
    true
  );

  var isReservedTag = function (tag) { return isHTMLTag(tag) || isSVG(tag); };

  // 

  function compileTemplate(component) {
    if (component.template) {
      if (!vueTemplateCompiler.compileToFunctions) {
        throwError(
          "vueTemplateCompiler is undefined, you must pass " +
            "precompiled components if vue-template-compiler is " +
            "undefined"
        );
      }

      if (component.template.charAt('#') === '#') {
        var el = document.querySelector(component.template);
        if (!el) {
          throwError('Cannot find element' + component.template);

          el = document.createElement('div');
        }
        component.template = el.innerHTML;
      }

      Object.assign(component, Object.assign({}, vueTemplateCompiler.compileToFunctions(component.template),
        {name: component.name}));
    }

    if (component.components) {
      Object.keys(component.components).forEach(function (c) {
        var cmp = component.components[c];
        if (!cmp.render) {
          compileTemplate(cmp);
        }
      });
    }

    if (component.extends) {
      compileTemplate(component.extends);
    }

    if (component.extendOptions && !component.options.render) {
      compileTemplate(component.options);
    }
  }

  function compileTemplateForSlots(slots) {
    Object.keys(slots).forEach(function (key) {
      var slot = Array.isArray(slots[key]) ? slots[key] : [slots[key]];
      slot.forEach(function (slotValue) {
        if (componentNeedsCompiling(slotValue)) {
          compileTemplate(slotValue);
        }
      });
    });
  }

  // 

  var MOUNTING_OPTIONS = [
    'attachToDocument',
    'mocks',
    'slots',
    'localVue',
    'stubs',
    'context',
    'clone',
    'attrs',
    'listeners',
    'propsData',
    'shouldProxy'
  ];

  function extractInstanceOptions(options) {
    var instanceOptions = Object.assign({}, options);
    MOUNTING_OPTIONS.forEach(function (mountingOption) {
      delete instanceOptions[mountingOption];
    });
    return instanceOptions
  }

  // 

  function isDestructuringSlotScope(slotScope) {
    return /^{.*}$/.test(slotScope)
  }

  function getVueTemplateCompilerHelpers(
    _Vue
  ) {
    // $FlowIgnore
    var vue = new _Vue();
    var helpers = {};
    var names = [
      '_c',
      '_o',
      '_n',
      '_s',
      '_l',
      '_t',
      '_q',
      '_i',
      '_m',
      '_f',
      '_k',
      '_b',
      '_v',
      '_e',
      '_u',
      '_g'
    ];
    names.forEach(function (name) {
      helpers[name] = vue._renderProxy[name];
    });
    helpers.$createElement = vue._renderProxy.$createElement;
    helpers.$set = vue._renderProxy.$set;
    return helpers
  }

  function validateEnvironment() {
    if (VUE_VERSION < 2.1) {
      throwError("the scopedSlots option is only supported in vue@2.1+.");
    }
  }

  function isScopedSlot(slot) {
    if (typeof slot === 'function') { return { match: null, slot: slot } }

    var slotScopeRe = /<[^>]+ slot-scope="(.+)"/;
    var vSlotRe = /<template v-slot(?::.+)?="(.+)"/;
    var shortVSlotRe = /<template #.*="(.+)"/;

    var hasOldSlotScope = slot.match(slotScopeRe);
    var hasVSlotScopeAttr = slot.match(vSlotRe);
    var hasShortVSlotScopeAttr = slot.match(shortVSlotRe);

    if (hasOldSlotScope) {
      return { slot: slot, match: hasOldSlotScope }
    } else if (hasVSlotScopeAttr || hasShortVSlotScopeAttr) {
      // Strip v-slot and #slot attributes from `template` tag. compileToFunctions leaves empty `template` tag otherwise.
      var sanitizedSlot = slot.replace(
        /(<template)([^>]+)(>.+<\/template>)/,
        '$1$3'
      );
      return {
        slot: sanitizedSlot,
        match: hasVSlotScopeAttr || hasShortVSlotScopeAttr
      }
    }
    // we have no matches, so we just return
    return {
      slot: slot,
      match: null
    }
  }

  // Hide warning about <template> disallowed as root element
  function customWarn(msg) {
    if (msg.indexOf('Cannot use <template> as component root element') === -1) {
      console.error(msg);
    }
  }

  function createScopedSlots(
    scopedSlotsOption,
    _Vue
  ) {
    var scopedSlots = {};
    if (!scopedSlotsOption) {
      return scopedSlots
    }
    validateEnvironment();
    var helpers = getVueTemplateCompilerHelpers(_Vue);
    var loop = function ( scopedSlotName ) {
      var slot = scopedSlotsOption[scopedSlotName];
      var isFn = typeof slot === 'function';

      var scopedSlotMatches = isScopedSlot(slot);

      // Type check to silence flow (can't use isFn)
      var renderFn =
        typeof slot === 'function'
          ? slot
          : vueTemplateCompiler.compileToFunctions(scopedSlotMatches.slot, { warn: customWarn })
              .render;

      var slotScope = scopedSlotMatches.match && scopedSlotMatches.match[1];

      scopedSlots[scopedSlotName] = function(props) {
        var obj;

        var res;
        if (isFn) {
          res = renderFn.call(Object.assign({}, helpers), props);
        } else if (slotScope && !isDestructuringSlotScope(slotScope)) {
          res = renderFn.call(Object.assign({}, helpers, ( obj = {}, obj[slotScope] = props, obj )));
        } else if (slotScope && isDestructuringSlotScope(slotScope)) {
          res = renderFn.call(Object.assign({}, helpers, props));
        } else {
          res = renderFn.call(Object.assign({}, helpers, {props: props}));
        }
        // res is Array if <template> is a root element
        return Array.isArray(res) ? res[0] : res
      };
    };

    for (var scopedSlotName in scopedSlotsOption) loop( scopedSlotName );
    return scopedSlots
  }

  // 

  var FUNCTION_PLACEHOLDER = '[Function]';

  function isVueComponentStub(comp) {
    return (comp && comp.template) || isVueComponent(comp)
  }

  function isValidStub(stub) {
    return (
      typeof stub === 'boolean' ||
      (!!stub && typeof stub === 'string') ||
      isVueComponentStub(stub)
    )
  }

  function resolveComponent$1(obj, component) {
    return (
      obj[component] ||
      obj[hyphenate(component)] ||
      obj[camelize(component)] ||
      obj[capitalize(camelize(component))] ||
      obj[capitalize(component)] ||
      {}
    )
  }

  function getCoreProperties(componentOptions) {
    return {
      attrs: componentOptions.attrs,
      name: componentOptions.name,
      model: componentOptions.model,
      props: componentOptions.props,
      on: componentOptions.on,
      key: componentOptions.key,
      domProps: componentOptions.domProps,
      class: componentOptions.class,
      staticClass: componentOptions.staticClass,
      staticStyle: componentOptions.staticStyle,
      style: componentOptions.style,
      normalizedStyle: componentOptions.normalizedStyle,
      nativeOn: componentOptions.nativeOn,
      functional: componentOptions.functional,
      abstract: componentOptions.abstract
    }
  }

  function resolveOptions(component, _Vue) {
    if (isDynamicComponent(component)) {
      return {}
    }

    return isConstructor(component)
      ? component.options
      : _Vue.extend(component).options
  }

  function getScopedSlotRenderFunctions(ctx) {
    // In Vue 2.6+ a new v-slot syntax was introduced
    // scopedSlots are now saved in parent._vnode.data.scopedSlots
    // We filter out _normalized, $stable and $key keys
    if (
      ctx &&
      ctx.$options &&
      ctx.$options.parent &&
      ctx.$options.parent._vnode &&
      ctx.$options.parent._vnode.data &&
      ctx.$options.parent._vnode.data.scopedSlots
    ) {
      var slotKeys = ctx.$options.parent._vnode.data.scopedSlots;
      return keys(slotKeys).filter(
        function (x) { return x !== '_normalized' && x !== '$stable' && x !== '$key'; }
      )
    }

    return []
  }

  function createStubFromComponent(
    originalComponent,
    name,
    _Vue
  ) {
    var componentOptions = resolveOptions(originalComponent, _Vue);
    var tagName = (name || 'anonymous') + "-stub";

    // ignoreElements does not exist in Vue 2.0.x
    if (Vue__default['default'].config.ignoredElements) {
      Vue__default['default'].config.ignoredElements.push(tagName);
    }

    return Object.assign({}, getCoreProperties(componentOptions),
      {$_vueTestUtils_original: originalComponent,
      $_doNotStubChildren: true,
      render: function render(h, context) {
        var this$1 = this;

        return h(
          tagName,
          componentOptions.functional
            ? Object.assign({}, context.data,
                {attrs: Object.assign({}, shapeStubProps(context.props),
                  context.data.attrs)})
            : {
                attrs: Object.assign({}, shapeStubProps(this.$props))
              },
          context
            ? context.children
            : this.$options._renderChildren ||
                getScopedSlotRenderFunctions(this).map(function (x) { return this$1.$options.parent._vnode.data.scopedSlots[x]({}); }
                )
        )
      }})
  }

  function shapeStubProps(props) {
    var shapedProps = {};
    for (var propName in props) {
      if (typeof props[propName] === 'function') {
        shapedProps[propName] = FUNCTION_PLACEHOLDER;
        continue
      }

      if (Array.isArray(props[propName])) {
        shapedProps[propName] = props[propName].map(function (value) {
          return typeof value === 'function' ? FUNCTION_PLACEHOLDER : value
        });
        continue
      }

      shapedProps[propName] = props[propName];
    }

    return shapedProps
  }

  // DEPRECATED: converts string stub to template stub.
  function createStubFromString(templateString, name) {
    warnDeprecated('Using a string for stubs');

    if (templateContainsComponent(templateString, name)) {
      throwError('options.stub cannot contain a circular reference');
    }

    return {
      template: templateString,
      $_doNotStubChildren: true
    }
  }

  function setStubComponentName(
    stub,
    originalComponent,
    _Vue
  ) {
    if ( originalComponent === void 0 ) originalComponent = {};

    if (stub.name) { return }

    var componentOptions = resolveOptions(originalComponent, _Vue);
    stub.name = getCoreProperties(componentOptions).name;
  }

  function validateStub(stub) {
    if (!isValidStub(stub)) {
      throwError("options.stub values must be passed a string or " + "component");
    }
  }

  function createStubsFromStubsObject(
    originalComponents,
    stubs,
    _Vue
  ) {
    if ( originalComponents === void 0 ) originalComponents = {};

    return Object.keys(stubs || {}).reduce(function (acc, stubName) {
      var stub = stubs[stubName];

      validateStub(stub);

      if (stub === false) {
        return acc
      }

      var component = resolveComponent$1(originalComponents, stubName);

      if (stub === true) {
        acc[stubName] = createStubFromComponent(component, stubName, _Vue);
        return acc
      }

      if (typeof stub === 'string') {
        stub = createStubFromString(stub, stubName);
        stubs[stubName];
      }

      setStubComponentName(stub, component, _Vue);
      if (componentNeedsCompiling(stub)) {
        compileTemplate(stub);
      }

      acc[stubName] = stub;
      stub._Ctor = {};

      return acc
    }, {})
  }

  var isAllowlisted = function (el, allowlist) { return resolveComponent(el, allowlist); };
  var isAlreadyStubbed = function (el, stubs) { return stubs.has(el); };

  function shouldExtend(component, _Vue) {
    return isConstructor(component) || (component && component.extends)
  }

  function extend(component, _Vue) {
    var componentOptions = component.options ? component.options : component;
    var stub = _Vue.extend(componentOptions);
    stub.options.$_vueTestUtils_original = component;
    stub.options._base = _Vue;
    return stub
  }

  function createStubIfNeeded(shouldStub, component, _Vue, el) {
    if (shouldStub) {
      return createStubFromComponent(component || {}, el, _Vue)
    }

    if (shouldExtend(component)) {
      return extend(component, _Vue)
    }
  }

  function shouldNotBeStubbed(el, allowlist, modifiedComponents) {
    return (
      (typeof el === 'string' && isReservedTag(el)) ||
      isAllowlisted(el, allowlist) ||
      isAlreadyStubbed(el, modifiedComponents)
    )
  }

  function patchCreateElement(_Vue, stubs, stubAllComponents) {
    var obj;

    // This mixin patches vm.$createElement so that we can stub all components
    // before they are rendered in shallow mode. We also need to ensure that
    // component constructors were created from the _Vue constructor. If not,
    // we must replace them with components created from the _Vue constructor
    // before calling the original $createElement. This ensures that components
    // have the correct instance properties and stubs when they are rendered.
    function patchCreateElementMixin() {
      var vm = this;

      if (vm.$options.$_doNotStubChildren || vm.$options._isFunctionalContainer) {
        return
      }

      var modifiedComponents = new Set();
      var originalCreateElement = vm.$createElement;
      var originalComponents = vm.$options.components;

      var createElement = function (el) {
        var obj;

        var args = [], len = arguments.length - 1;
        while ( len-- > 0 ) args[ len ] = arguments[ len + 1 ];
        if (shouldNotBeStubbed(el, stubs, modifiedComponents)) {
          return originalCreateElement.apply(void 0, [ el ].concat( args ))
        }

        if (isConstructor(el) || isComponentOptions(el)) {
          if (stubAllComponents) {
            var stub = createStubFromComponent(el, el.name || 'anonymous', _Vue);
            return originalCreateElement.apply(void 0, [ stub ].concat( args ))
          }
          var Constructor = shouldExtend(el) ? extend(el, _Vue) : el;

          return originalCreateElement.apply(void 0, [ Constructor ].concat( args ))
        }

        if (typeof el === 'string') {
          var original = resolveComponent(el, originalComponents);

          if (!original) {
            return originalCreateElement.apply(void 0, [ el ].concat( args ))
          }

          if (isDynamicComponent(original)) {
            return originalCreateElement.apply(void 0, [ el ].concat( args ))
          }

          var stub$1 = createStubIfNeeded(stubAllComponents, original, _Vue, el);

          if (stub$1) {
            Object.assign(vm.$options.components, ( obj = {}, obj[el] = stub$1, obj ));
            modifiedComponents.add(el);
          }
        }

        return originalCreateElement.apply(void 0, [ el ].concat( args ))
      };

      vm[CREATE_ELEMENT_ALIAS] = createElement;
      vm.$createElement = createElement;
    }

    _Vue.mixin(( obj = {}, obj[BEFORE_RENDER_LIFECYCLE_HOOK] = patchCreateElementMixin, obj ));
  }

  // 

  function objectWithoutProperties (obj, exclude) { var target = {}; for (var k in obj) if (Object.prototype.hasOwnProperty.call(obj, k) && exclude.indexOf(k) === -1) target[k] = obj[k]; return target; }

  function createContext(options, scopedSlots, currentProps) {
    var on = Object.assign({}, (options.context && options.context.on),
      options.listeners);
    return Object.assign({}, {attrs: Object.assign({}, options.attrs,
        // pass as attrs so that inheritAttrs works correctly
        // props should take precedence over attrs
        currentProps)},
      (options.context || {}),
      {on: on,
      scopedSlots: scopedSlots})
  }

  function createChildren(vm, h, ref) {
    var slots = ref.slots;
    var context = ref.context;

    var slotVNodes = slots ? createSlotVNodes(vm, slots) : undefined;
    return (
      (context &&
        context.children &&
        context.children.map(function (x) { return (typeof x === 'function' ? x(h) : x); })) ||
      slotVNodes
    )
  }

  function getValuesFromCallableOption(optionValue) {
    if (typeof optionValue === 'function') {
      return optionValue.call(this)
    }
    return optionValue
  }

  function createInstance(
    component,
    options,
    _Vue
  ) {
    var componentOptions = isConstructor(component)
      ? component.options
      : component;

    // instance options are options that are passed to the
    // root instance when it's instantiated
    var instanceOptions = extractInstanceOptions(options);

    var globalComponents = _Vue.options.components || {};
    var componentsToStub = Object.assign(
      Object.create(globalComponents),
      componentOptions.components
    );

    var stubComponentsObject = createStubsFromStubsObject(
      componentsToStub,
      // $FlowIgnore
      options.stubs,
      _Vue
    );

    addEventLogger(_Vue);
    addMocks(_Vue, options.mocks);
    addStubs(_Vue, stubComponentsObject);
    patchCreateElement(_Vue, stubComponentsObject, options.shouldProxy);

    if (componentNeedsCompiling(componentOptions)) {
      compileTemplate(componentOptions);
    }

    // used to identify extended component using constructor
    componentOptions.$_vueTestUtils_original = component;

    // watchers provided in mounting options should override preexisting ones
    if (componentOptions.watch && instanceOptions.watch) {
      var componentWatchers = Object.keys(componentOptions.watch);
      var instanceWatchers = Object.keys(instanceOptions.watch);

      for (var i = 0; i < instanceWatchers.length; i++) {
        var k = instanceWatchers[i];
        // override the componentOptions with the one provided in mounting options
        if (componentWatchers.includes(k)) {
          componentOptions.watch[k] = instanceOptions.watch[k];
        }
      }
    }

    // make sure all extends are based on this instance
    var Constructor = _Vue.extend(componentOptions).extend(instanceOptions);
    Constructor.options._base = _Vue;

    var scopedSlots = createScopedSlots(options.scopedSlots, _Vue);

    var parentComponentOptions = options.parentComponent || {};

    var originalParentComponentProvide = parentComponentOptions.provide;
    parentComponentOptions.provide = function() {
      return Object.assign({}, getValuesFromCallableOption.call(this, originalParentComponentProvide),
        // $FlowIgnore
        getValuesFromCallableOption.call(this, options.provide))
    };

    var originalParentComponentData = parentComponentOptions.data;
    parentComponentOptions.data = function() {
      return Object.assign({}, getValuesFromCallableOption.call(this, originalParentComponentData),
        {vueTestUtils_childProps: Object.assign({}, options.propsData)})
    };

    parentComponentOptions.$_doNotStubChildren = true;
    parentComponentOptions.$_isWrapperParent = true;
    parentComponentOptions._isFunctionalContainer = componentOptions.functional;
    parentComponentOptions.render = function(h) {
      return h(
        Constructor,
        createContext(options, scopedSlots, this.vueTestUtils_childProps),
        createChildren(this, h, options)
      )
    };

    // options  "propsData" can only be used during instance creation with the `new` keyword
    // "data" should be set only on component under test to avoid reactivity issues
    var propsData = options.propsData;
    var data = options.data;
    var rest$1 = objectWithoutProperties( options, ["propsData", "data"] );
    var rest = rest$1; // eslint-disable-line
    var Parent = _Vue.extend(Object.assign({}, rest,
      parentComponentOptions));

    return new Parent()
  }

  // 

  function createElement() {
    if (document) {
      var elem = document.createElement('div');

      if (document.body) {
        document.body.appendChild(elem);
      }
      return elem
    }
  }

  // 

  function findDOMNodes(
    element,
    selector
  ) {
    var nodes = [];
    if (!element || !element.querySelectorAll || !element.matches) {
      return nodes
    }

    if (element.matches(selector)) {
      nodes.push(element);
    }
    // $FlowIgnore
    return nodes.concat([].slice.call(element.querySelectorAll(selector)))
  }

  function vmMatchesName(vm, name) {
    // We want to mirror how Vue resolves component names in SFCs:
    // For example, <test-component />, <TestComponent /> and `<testComponent />
    // all resolve to the same component
    var componentName = isFunctionalComponent(vm)
      ? vm.name
      : vm.$options && vm.$options.name;

    return (
      !!name &&
      !!componentName &&
      (componentName === name ||
        // testComponent -> TestComponent
        componentName === capitalize(name) ||
        // test-component -> TestComponent
        componentName === capitalize(camelize(name)) ||
        // same match as above, but the component name vs query
        capitalize(camelize(componentName)) === name)
    )
  }

  function vmCtorMatches(vm, component) {
    if (
      (vm.$options && vm.$options.$_vueTestUtils_original === component) ||
      vm.$_vueTestUtils_original === component
    ) {
      return true
    }

    var Ctor = isConstructor(component)
      ? component.options._Ctor
      : component._Ctor;

    if (!Ctor) {
      return false
    }

    if (vm.constructor.extendOptions === component) {
      return true
    }

    if (component.functional) {
      return Object.keys(vm._Ctor || {}).some(function (c) {
        return component === vm._Ctor[c].extendOptions
      })
    }
  }

  function matches(node, selector) {
    if (selector.type === DOM_SELECTOR) {
      var element = node instanceof Element ? node : node.elm;
      return element && element.matches && element.matches(selector.value)
    }

    var isFunctionalSelector = isConstructor(selector.value)
      ? selector.value.options.functional
      : selector.value.functional;

    var componentInstance =
      (isFunctionalSelector ? node[FUNCTIONAL_OPTIONS] : node.child) ||
      node[FUNCTIONAL_OPTIONS] ||
      node.child;

    if (!componentInstance) {
      return false
    }

    if (selector.type === COMPONENT_SELECTOR) {
      if (vmCtorMatches(componentInstance, selector.value)) {
        return true
      }
    }

    // Fallback to name selector for COMPONENT_SELECTOR for Vue < 2.1
    var nameSelector = isConstructor(selector.value)
      ? selector.value.extendOptions.name
      : selector.value.name;
    return vmMatchesName(componentInstance, nameSelector)
  }

  // 

  /**
   * Traverses a vue instance for its parents and returns them in an array format
   * @param {Component} vm
   * @returns {Component[]} The component and its corresponding parents, in order from left to right
   */
  function findAllParentInstances(childVm) {
    var instances = [childVm];

    function getParent(_vm) {
      if (_vm && _vm.$parent) {
        instances.push(_vm.$parent);
        return getParent(_vm.$parent)
      }
      return _vm
    }

    getParent(childVm);
    return instances
  }

  function findAllInstances(rootVm) {
    var instances = [rootVm];
    var i = 0;
    while (i < instances.length) {
      var vm = instances[i]
      ;(vm.$children || []).forEach(function (child) {
        instances.push(child);
      });
      i++;
    }
    return instances
  }

  function findAllVNodes(vnode, selector) {
    var matchingNodes = [];
    var nodes = [vnode];
    while (nodes.length) {
      var node = nodes.shift();
      if (node.children) {
        var children = [].concat( node.children ).reverse();
        children.forEach(function (n) {
          nodes.unshift(n);
        });
      }
      if (node.child) {
        nodes.unshift(node.child._vnode);
      }
      if (matches(node, selector)) {
        matchingNodes.push(node);
      }
    }

    return matchingNodes
  }

  function removeDuplicateNodes(vNodes) {
    var vNodeElms = vNodes.map(function (vNode) { return vNode.elm; });
    return vNodes.filter(function (vNode, index) { return index === vNodeElms.indexOf(vNode.elm); })
  }

  function find(
    root,
    vm,
    selector
  ) {
    if (root instanceof Element && selector.type !== DOM_SELECTOR) {
      throwError(
        "cannot find a Vue instance on a DOM node. The node " +
          "you are calling find on does not exist in the " +
          "VDom. Are you adding the node as innerHTML?"
      );
    }

    if (
      selector.type === COMPONENT_SELECTOR &&
      (selector.value.functional ||
        (selector.value.options && selector.value.options.functional)) &&
      VUE_VERSION < 2.3
    ) {
      throwError(
        "find for functional components is not supported " + "in Vue < 2.3"
      );
    }

    if (root instanceof Element) {
      return findDOMNodes(root, selector.value)
    }

    if (!root && selector.type !== DOM_SELECTOR) {
      throwError(
        "cannot find a Vue instance on a DOM node. The node " +
          "you are calling find on does not exist in the " +
          "VDom. Are you adding the node as innerHTML?"
      );
    }

    if (!vm && selector.type === REF_SELECTOR) {
      throwError("$ref selectors can only be used on Vue component " + "wrappers");
    }

    if (vm && vm.$refs && selector.value.ref in vm.$refs) {
      var refs = vm.$refs[selector.value.ref];
      return Array.isArray(refs) ? refs : [refs]
    }

    var nodes = findAllVNodes(root, selector);
    var dedupedNodes = removeDuplicateNodes(nodes);

    if (nodes.length > 0 || selector.type !== DOM_SELECTOR) {
      return dedupedNodes
    }

    // Fallback in case element exists in HTML, but not in vnode tree
    // (e.g. if innerHTML is set as a domProp)
    return findDOMNodes(root.elm, selector.value)
  }

  function errorHandler(errorOrString, vm, info) {
    var error =
      typeof errorOrString === 'object' ? errorOrString : new Error(errorOrString);

    // If a user defined errorHandler was register via createLocalVue
    // find and call the user defined errorHandler
    var instancedErrorHandlers = findAllParentInstances(vm)
      .filter(
        function (_vm) { return _vm &&
          _vm.$options &&
          _vm.$options.localVue &&
          _vm.$options.localVue.config &&
          _vm.$options.localVue.config.errorHandler; }
      )
      .map(function (_vm) { return _vm.$options.localVue.config.errorHandler; });

    if (vm) {
      vm._error = error;
    }

    if (!instancedErrorHandlers.length) {
      throw error
    }
    // should be one error handler, as only once can be registered with local vue
    // regardless, if more exist (for whatever reason), invoke the other user defined error handlers
    instancedErrorHandlers.forEach(function (instancedErrorHandler) {
      instancedErrorHandler(error, vm, info);
    });
  }

  function throwIfInstancesThrew(vm) {
    var instancesWithError = findAllInstances(vm).filter(function (_vm) { return _vm._error; });

    if (instancesWithError.length > 0) {
      throw instancesWithError[0]._error
    }
  }

  var hasWarned = false;

  // Vue swallows errors thrown by instances, even if the global error handler
  // throws. In order to throw in the test, we add an _error property to an
  // instance when it throws. Then we loop through the instances with
  // throwIfInstancesThrew and throw an error in the test context if any
  // instances threw.
  function addGlobalErrorHandler(_Vue) {
    var existingErrorHandler = _Vue.config.errorHandler;

    if (existingErrorHandler === errorHandler) {
      return
    }

    if (_Vue.config.errorHandler && !hasWarned) {
      warn(
        "Global error handler detected (Vue.config.errorHandler). \n" +
          "Vue Test Utils sets a custom error handler to throw errors " +
          "thrown by instances. If you want this behavior in " +
          "your tests, you must remove the global error handler."
      );
      hasWarned = true;
    } else {
      _Vue.config.errorHandler = errorHandler;
    }
  }

  function normalizeStubs(stubs) {
    if ( stubs === void 0 ) stubs = {};

    if (stubs === false) {
      return false
    }
    if (isPlainObject(stubs)) {
      return stubs
    }
    if (Array.isArray(stubs)) {
      return stubs.reduce(function (acc, stub) {
        if (typeof stub !== 'string') {
          throwError('each item in an options.stubs array must be a string');
        }
        acc[stub] = true;
        return acc
      }, {})
    }
    throwError('options.stubs must be an object or an Array');
  }

  function normalizeProvide(provide) {
    // Objects are not resolved in extended components in Vue < 2.5
    // https://github.com/vuejs/vue/issues/6436
    if (typeof provide === 'object' && VUE_VERSION < 2.5) {
      var obj = Object.assign({}, provide);
      return function () { return obj; }
    }
    return provide
  }

  // 

  function getOption(option, config) {
    if (option === false) {
      return false
    }
    if (option || (config && Object.keys(config).length > 0)) {
      if (option instanceof Function) {
        return option
      }
      if (config instanceof Function) {
        throw new Error("Config can't be a Function.")
      }
      return Object.assign({}, config,
        option)
    }
  }

  function getStubs(stubs, configStubs) {
    var normalizedStubs = normalizeStubs(stubs);
    var normalizedConfigStubs = normalizeStubs(configStubs);
    return getOption(normalizedStubs, normalizedConfigStubs)
  }

  function mergeOptions(
    options,
    config
  ) {
    var mocks = (getOption(options.mocks, config.mocks));
    var methods = (getOption(options.methods, config.methods));
    if (methods && Object.keys(methods).length) {
      warnDeprecated(
        'overwriting methods via the `methods` property',
        'There is no clear migration path for the `methods` property - Vue does not support arbitrarily replacement of methods, nor should VTU. To stub a complex method extract it from the component and test it in isolation. Otherwise, the suggestion is to rethink those tests'
      );
    }

    var provide = (getOption(options.provide, config.provide));
    var stubs = (getStubs(options.stubs, config.stubs));
    // $FlowIgnore
    return Object.assign({}, options,
      {provide: normalizeProvide(provide),
      stubs: stubs,
      mocks: mocks,
      methods: methods})
  }

  var config = {
    stubs: {
      transition: true,
      'transition-group': true
    },
    mocks: {},
    methods: {},
    provide: {},
    showDeprecationWarnings:
       true
  };

  // 

  function warnIfNoWindow() {
    if (typeof window === 'undefined') {
      throwError(
        "window is undefined, vue-test-utils needs to be " +
          "run in a browser environment. \n" +
          "You can run the tests in node using jsdom \n" +
          "See https://vue-test-utils.vuejs.org/guides/#browser-environment " +
          "for more details."
      );
    }
  }

  function polyfill() {
    // Polyfill `Element.matches()` for IE and older versions of Chrome:
    // https://developer.mozilla.org/en-US/docs/Web/API/Element/matches#Polyfill
    if (!Element.prototype.matches) {
      Element.prototype.matches =
        Element.prototype.msMatchesSelector ||
        Element.prototype.webkitMatchesSelector;
    }
  }

  /*jshint node:true */

  function OutputLine(parent) {
    this.__parent = parent;
    this.__character_count = 0;
    // use indent_count as a marker for this.__lines that have preserved indentation
    this.__indent_count = -1;
    this.__alignment_count = 0;
    this.__wrap_point_index = 0;
    this.__wrap_point_character_count = 0;
    this.__wrap_point_indent_count = -1;
    this.__wrap_point_alignment_count = 0;

    this.__items = [];
  }

  OutputLine.prototype.clone_empty = function() {
    var line = new OutputLine(this.__parent);
    line.set_indent(this.__indent_count, this.__alignment_count);
    return line;
  };

  OutputLine.prototype.item = function(index) {
    if (index < 0) {
      return this.__items[this.__items.length + index];
    } else {
      return this.__items[index];
    }
  };

  OutputLine.prototype.has_match = function(pattern) {
    for (var lastCheckedOutput = this.__items.length - 1; lastCheckedOutput >= 0; lastCheckedOutput--) {
      if (this.__items[lastCheckedOutput].match(pattern)) {
        return true;
      }
    }
    return false;
  };

  OutputLine.prototype.set_indent = function(indent, alignment) {
    if (this.is_empty()) {
      this.__indent_count = indent || 0;
      this.__alignment_count = alignment || 0;
      this.__character_count = this.__parent.get_indent_size(this.__indent_count, this.__alignment_count);
    }
  };

  OutputLine.prototype._set_wrap_point = function() {
    if (this.__parent.wrap_line_length) {
      this.__wrap_point_index = this.__items.length;
      this.__wrap_point_character_count = this.__character_count;
      this.__wrap_point_indent_count = this.__parent.next_line.__indent_count;
      this.__wrap_point_alignment_count = this.__parent.next_line.__alignment_count;
    }
  };

  OutputLine.prototype._should_wrap = function() {
    return this.__wrap_point_index &&
      this.__character_count > this.__parent.wrap_line_length &&
      this.__wrap_point_character_count > this.__parent.next_line.__character_count;
  };

  OutputLine.prototype._allow_wrap = function() {
    if (this._should_wrap()) {
      this.__parent.add_new_line();
      var next = this.__parent.current_line;
      next.set_indent(this.__wrap_point_indent_count, this.__wrap_point_alignment_count);
      next.__items = this.__items.slice(this.__wrap_point_index);
      this.__items = this.__items.slice(0, this.__wrap_point_index);

      next.__character_count += this.__character_count - this.__wrap_point_character_count;
      this.__character_count = this.__wrap_point_character_count;

      if (next.__items[0] === " ") {
        next.__items.splice(0, 1);
        next.__character_count -= 1;
      }
      return true;
    }
    return false;
  };

  OutputLine.prototype.is_empty = function() {
    return this.__items.length === 0;
  };

  OutputLine.prototype.last = function() {
    if (!this.is_empty()) {
      return this.__items[this.__items.length - 1];
    } else {
      return null;
    }
  };

  OutputLine.prototype.push = function(item) {
    this.__items.push(item);
    var last_newline_index = item.lastIndexOf('\n');
    if (last_newline_index !== -1) {
      this.__character_count = item.length - last_newline_index;
    } else {
      this.__character_count += item.length;
    }
  };

  OutputLine.prototype.pop = function() {
    var item = null;
    if (!this.is_empty()) {
      item = this.__items.pop();
      this.__character_count -= item.length;
    }
    return item;
  };


  OutputLine.prototype._remove_indent = function() {
    if (this.__indent_count > 0) {
      this.__indent_count -= 1;
      this.__character_count -= this.__parent.indent_size;
    }
  };

  OutputLine.prototype._remove_wrap_indent = function() {
    if (this.__wrap_point_indent_count > 0) {
      this.__wrap_point_indent_count -= 1;
    }
  };
  OutputLine.prototype.trim = function() {
    while (this.last() === ' ') {
      this.__items.pop();
      this.__character_count -= 1;
    }
  };

  OutputLine.prototype.toString = function() {
    var result = '';
    if (this.is_empty()) {
      if (this.__parent.indent_empty_lines) {
        result = this.__parent.get_indent_string(this.__indent_count);
      }
    } else {
      result = this.__parent.get_indent_string(this.__indent_count, this.__alignment_count);
      result += this.__items.join('');
    }
    return result;
  };

  function IndentStringCache(options, baseIndentString) {
    this.__cache = [''];
    this.__indent_size = options.indent_size;
    this.__indent_string = options.indent_char;
    if (!options.indent_with_tabs) {
      this.__indent_string = new Array(options.indent_size + 1).join(options.indent_char);
    }

    // Set to null to continue support for auto detection of base indent
    baseIndentString = baseIndentString || '';
    if (options.indent_level > 0) {
      baseIndentString = new Array(options.indent_level + 1).join(this.__indent_string);
    }

    this.__base_string = baseIndentString;
    this.__base_string_length = baseIndentString.length;
  }

  IndentStringCache.prototype.get_indent_size = function(indent, column) {
    var result = this.__base_string_length;
    column = column || 0;
    if (indent < 0) {
      result = 0;
    }
    result += indent * this.__indent_size;
    result += column;
    return result;
  };

  IndentStringCache.prototype.get_indent_string = function(indent_level, column) {
    var result = this.__base_string;
    column = column || 0;
    if (indent_level < 0) {
      indent_level = 0;
      result = '';
    }
    column += indent_level * this.__indent_size;
    this.__ensure_cache(column);
    result += this.__cache[column];
    return result;
  };

  IndentStringCache.prototype.__ensure_cache = function(column) {
    while (column >= this.__cache.length) {
      this.__add_column();
    }
  };

  IndentStringCache.prototype.__add_column = function() {
    var column = this.__cache.length;
    var indent = 0;
    var result = '';
    if (this.__indent_size && column >= this.__indent_size) {
      indent = Math.floor(column / this.__indent_size);
      column -= indent * this.__indent_size;
      result = new Array(indent + 1).join(this.__indent_string);
    }
    if (column) {
      result += new Array(column + 1).join(' ');
    }

    this.__cache.push(result);
  };

  function Output(options, baseIndentString) {
    this.__indent_cache = new IndentStringCache(options, baseIndentString);
    this.raw = false;
    this._end_with_newline = options.end_with_newline;
    this.indent_size = options.indent_size;
    this.wrap_line_length = options.wrap_line_length;
    this.indent_empty_lines = options.indent_empty_lines;
    this.__lines = [];
    this.previous_line = null;
    this.current_line = null;
    this.next_line = new OutputLine(this);
    this.space_before_token = false;
    this.non_breaking_space = false;
    this.previous_token_wrapped = false;
    // initialize
    this.__add_outputline();
  }

  Output.prototype.__add_outputline = function() {
    this.previous_line = this.current_line;
    this.current_line = this.next_line.clone_empty();
    this.__lines.push(this.current_line);
  };

  Output.prototype.get_line_number = function() {
    return this.__lines.length;
  };

  Output.prototype.get_indent_string = function(indent, column) {
    return this.__indent_cache.get_indent_string(indent, column);
  };

  Output.prototype.get_indent_size = function(indent, column) {
    return this.__indent_cache.get_indent_size(indent, column);
  };

  Output.prototype.is_empty = function() {
    return !this.previous_line && this.current_line.is_empty();
  };

  Output.prototype.add_new_line = function(force_newline) {
    // never newline at the start of file
    // otherwise, newline only if we didn't just add one or we're forced
    if (this.is_empty() ||
      (!force_newline && this.just_added_newline())) {
      return false;
    }

    // if raw output is enabled, don't print additional newlines,
    // but still return True as though you had
    if (!this.raw) {
      this.__add_outputline();
    }
    return true;
  };

  Output.prototype.get_code = function(eol) {
    this.trim(true);

    // handle some edge cases where the last tokens
    // has text that ends with newline(s)
    var last_item = this.current_line.pop();
    if (last_item) {
      if (last_item[last_item.length - 1] === '\n') {
        last_item = last_item.replace(/\n+$/g, '');
      }
      this.current_line.push(last_item);
    }

    if (this._end_with_newline) {
      this.__add_outputline();
    }

    var sweet_code = this.__lines.join('\n');

    if (eol !== '\n') {
      sweet_code = sweet_code.replace(/[\n]/g, eol);
    }
    return sweet_code;
  };

  Output.prototype.set_wrap_point = function() {
    this.current_line._set_wrap_point();
  };

  Output.prototype.set_indent = function(indent, alignment) {
    indent = indent || 0;
    alignment = alignment || 0;

    // Next line stores alignment values
    this.next_line.set_indent(indent, alignment);

    // Never indent your first output indent at the start of the file
    if (this.__lines.length > 1) {
      this.current_line.set_indent(indent, alignment);
      return true;
    }

    this.current_line.set_indent();
    return false;
  };

  Output.prototype.add_raw_token = function(token) {
    for (var x = 0; x < token.newlines; x++) {
      this.__add_outputline();
    }
    this.current_line.set_indent(-1);
    this.current_line.push(token.whitespace_before);
    this.current_line.push(token.text);
    this.space_before_token = false;
    this.non_breaking_space = false;
    this.previous_token_wrapped = false;
  };

  Output.prototype.add_token = function(printable_token) {
    this.__add_space_before_token();
    this.current_line.push(printable_token);
    this.space_before_token = false;
    this.non_breaking_space = false;
    this.previous_token_wrapped = this.current_line._allow_wrap();
  };

  Output.prototype.__add_space_before_token = function() {
    if (this.space_before_token && !this.just_added_newline()) {
      if (!this.non_breaking_space) {
        this.set_wrap_point();
      }
      this.current_line.push(' ');
    }
  };

  Output.prototype.remove_indent = function(index) {
    var output_length = this.__lines.length;
    while (index < output_length) {
      this.__lines[index]._remove_indent();
      index++;
    }
    this.current_line._remove_wrap_indent();
  };

  Output.prototype.trim = function(eat_newlines) {
    eat_newlines = (eat_newlines === undefined) ? false : eat_newlines;

    this.current_line.trim();

    while (eat_newlines && this.__lines.length > 1 &&
      this.current_line.is_empty()) {
      this.__lines.pop();
      this.current_line = this.__lines[this.__lines.length - 1];
      this.current_line.trim();
    }

    this.previous_line = this.__lines.length > 1 ?
      this.__lines[this.__lines.length - 2] : null;
  };

  Output.prototype.just_added_newline = function() {
    return this.current_line.is_empty();
  };

  Output.prototype.just_added_blankline = function() {
    return this.is_empty() ||
      (this.current_line.is_empty() && this.previous_line.is_empty());
  };

  Output.prototype.ensure_empty_line_above = function(starts_with, ends_with) {
    var index = this.__lines.length - 2;
    while (index >= 0) {
      var potentialEmptyLine = this.__lines[index];
      if (potentialEmptyLine.is_empty()) {
        break;
      } else if (potentialEmptyLine.item(0).indexOf(starts_with) !== 0 &&
        potentialEmptyLine.item(-1) !== ends_with) {
        this.__lines.splice(index + 1, 0, new OutputLine(this));
        this.previous_line = this.__lines[this.__lines.length - 2];
        break;
      }
      index--;
    }
  };

  var Output_1 = Output;

  var output = {
  	Output: Output_1
  };

  /*jshint node:true */

  function Token(type, text, newlines, whitespace_before) {
    this.type = type;
    this.text = text;

    // comments_before are
    // comments that have a new line before them
    // and may or may not have a newline after
    // this is a set of comments before
    this.comments_before = null; /* inline comment*/


    // this.comments_after =  new TokenStream(); // no new line before and newline after
    this.newlines = newlines || 0;
    this.whitespace_before = whitespace_before || '';
    this.parent = null;
    this.next = null;
    this.previous = null;
    this.opened = null;
    this.closed = null;
    this.directives = null;
  }


  var Token_1 = Token;

  var token = {
  	Token: Token_1
  };

  var acorn = createCommonjsModule(function (module, exports) {

  // acorn used char codes to squeeze the last bit of performance out
  // Beautifier is okay without that, so we're using regex
  // permit $ (36) and @ (64). @ is used in ES7 decorators.
  // 65 through 91 are uppercase letters.
  // permit _ (95).
  // 97 through 123 are lowercase letters.
  var baseASCIIidentifierStartChars = "\\x24\\x40\\x41-\\x5a\\x5f\\x61-\\x7a";

  // inside an identifier @ is not allowed but 0-9 are.
  var baseASCIIidentifierChars = "\\x24\\x30-\\x39\\x41-\\x5a\\x5f\\x61-\\x7a";

  // Big ugly regular expressions that match characters in the
  // whitespace, identifier, and identifier-start categories. These
  // are only applied when a character is found to actually have a
  // code point above 128.
  var nonASCIIidentifierStartChars = "\\xaa\\xb5\\xba\\xc0-\\xd6\\xd8-\\xf6\\xf8-\\u02c1\\u02c6-\\u02d1\\u02e0-\\u02e4\\u02ec\\u02ee\\u0370-\\u0374\\u0376\\u0377\\u037a-\\u037d\\u0386\\u0388-\\u038a\\u038c\\u038e-\\u03a1\\u03a3-\\u03f5\\u03f7-\\u0481\\u048a-\\u0527\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05d0-\\u05ea\\u05f0-\\u05f2\\u0620-\\u064a\\u066e\\u066f\\u0671-\\u06d3\\u06d5\\u06e5\\u06e6\\u06ee\\u06ef\\u06fa-\\u06fc\\u06ff\\u0710\\u0712-\\u072f\\u074d-\\u07a5\\u07b1\\u07ca-\\u07ea\\u07f4\\u07f5\\u07fa\\u0800-\\u0815\\u081a\\u0824\\u0828\\u0840-\\u0858\\u08a0\\u08a2-\\u08ac\\u0904-\\u0939\\u093d\\u0950\\u0958-\\u0961\\u0971-\\u0977\\u0979-\\u097f\\u0985-\\u098c\\u098f\\u0990\\u0993-\\u09a8\\u09aa-\\u09b0\\u09b2\\u09b6-\\u09b9\\u09bd\\u09ce\\u09dc\\u09dd\\u09df-\\u09e1\\u09f0\\u09f1\\u0a05-\\u0a0a\\u0a0f\\u0a10\\u0a13-\\u0a28\\u0a2a-\\u0a30\\u0a32\\u0a33\\u0a35\\u0a36\\u0a38\\u0a39\\u0a59-\\u0a5c\\u0a5e\\u0a72-\\u0a74\\u0a85-\\u0a8d\\u0a8f-\\u0a91\\u0a93-\\u0aa8\\u0aaa-\\u0ab0\\u0ab2\\u0ab3\\u0ab5-\\u0ab9\\u0abd\\u0ad0\\u0ae0\\u0ae1\\u0b05-\\u0b0c\\u0b0f\\u0b10\\u0b13-\\u0b28\\u0b2a-\\u0b30\\u0b32\\u0b33\\u0b35-\\u0b39\\u0b3d\\u0b5c\\u0b5d\\u0b5f-\\u0b61\\u0b71\\u0b83\\u0b85-\\u0b8a\\u0b8e-\\u0b90\\u0b92-\\u0b95\\u0b99\\u0b9a\\u0b9c\\u0b9e\\u0b9f\\u0ba3\\u0ba4\\u0ba8-\\u0baa\\u0bae-\\u0bb9\\u0bd0\\u0c05-\\u0c0c\\u0c0e-\\u0c10\\u0c12-\\u0c28\\u0c2a-\\u0c33\\u0c35-\\u0c39\\u0c3d\\u0c58\\u0c59\\u0c60\\u0c61\\u0c85-\\u0c8c\\u0c8e-\\u0c90\\u0c92-\\u0ca8\\u0caa-\\u0cb3\\u0cb5-\\u0cb9\\u0cbd\\u0cde\\u0ce0\\u0ce1\\u0cf1\\u0cf2\\u0d05-\\u0d0c\\u0d0e-\\u0d10\\u0d12-\\u0d3a\\u0d3d\\u0d4e\\u0d60\\u0d61\\u0d7a-\\u0d7f\\u0d85-\\u0d96\\u0d9a-\\u0db1\\u0db3-\\u0dbb\\u0dbd\\u0dc0-\\u0dc6\\u0e01-\\u0e30\\u0e32\\u0e33\\u0e40-\\u0e46\\u0e81\\u0e82\\u0e84\\u0e87\\u0e88\\u0e8a\\u0e8d\\u0e94-\\u0e97\\u0e99-\\u0e9f\\u0ea1-\\u0ea3\\u0ea5\\u0ea7\\u0eaa\\u0eab\\u0ead-\\u0eb0\\u0eb2\\u0eb3\\u0ebd\\u0ec0-\\u0ec4\\u0ec6\\u0edc-\\u0edf\\u0f00\\u0f40-\\u0f47\\u0f49-\\u0f6c\\u0f88-\\u0f8c\\u1000-\\u102a\\u103f\\u1050-\\u1055\\u105a-\\u105d\\u1061\\u1065\\u1066\\u106e-\\u1070\\u1075-\\u1081\\u108e\\u10a0-\\u10c5\\u10c7\\u10cd\\u10d0-\\u10fa\\u10fc-\\u1248\\u124a-\\u124d\\u1250-\\u1256\\u1258\\u125a-\\u125d\\u1260-\\u1288\\u128a-\\u128d\\u1290-\\u12b0\\u12b2-\\u12b5\\u12b8-\\u12be\\u12c0\\u12c2-\\u12c5\\u12c8-\\u12d6\\u12d8-\\u1310\\u1312-\\u1315\\u1318-\\u135a\\u1380-\\u138f\\u13a0-\\u13f4\\u1401-\\u166c\\u166f-\\u167f\\u1681-\\u169a\\u16a0-\\u16ea\\u16ee-\\u16f0\\u1700-\\u170c\\u170e-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176c\\u176e-\\u1770\\u1780-\\u17b3\\u17d7\\u17dc\\u1820-\\u1877\\u1880-\\u18a8\\u18aa\\u18b0-\\u18f5\\u1900-\\u191c\\u1950-\\u196d\\u1970-\\u1974\\u1980-\\u19ab\\u19c1-\\u19c7\\u1a00-\\u1a16\\u1a20-\\u1a54\\u1aa7\\u1b05-\\u1b33\\u1b45-\\u1b4b\\u1b83-\\u1ba0\\u1bae\\u1baf\\u1bba-\\u1be5\\u1c00-\\u1c23\\u1c4d-\\u1c4f\\u1c5a-\\u1c7d\\u1ce9-\\u1cec\\u1cee-\\u1cf1\\u1cf5\\u1cf6\\u1d00-\\u1dbf\\u1e00-\\u1f15\\u1f18-\\u1f1d\\u1f20-\\u1f45\\u1f48-\\u1f4d\\u1f50-\\u1f57\\u1f59\\u1f5b\\u1f5d\\u1f5f-\\u1f7d\\u1f80-\\u1fb4\\u1fb6-\\u1fbc\\u1fbe\\u1fc2-\\u1fc4\\u1fc6-\\u1fcc\\u1fd0-\\u1fd3\\u1fd6-\\u1fdb\\u1fe0-\\u1fec\\u1ff2-\\u1ff4\\u1ff6-\\u1ffc\\u2071\\u207f\\u2090-\\u209c\\u2102\\u2107\\u210a-\\u2113\\u2115\\u2119-\\u211d\\u2124\\u2126\\u2128\\u212a-\\u212d\\u212f-\\u2139\\u213c-\\u213f\\u2145-\\u2149\\u214e\\u2160-\\u2188\\u2c00-\\u2c2e\\u2c30-\\u2c5e\\u2c60-\\u2ce4\\u2ceb-\\u2cee\\u2cf2\\u2cf3\\u2d00-\\u2d25\\u2d27\\u2d2d\\u2d30-\\u2d67\\u2d6f\\u2d80-\\u2d96\\u2da0-\\u2da6\\u2da8-\\u2dae\\u2db0-\\u2db6\\u2db8-\\u2dbe\\u2dc0-\\u2dc6\\u2dc8-\\u2dce\\u2dd0-\\u2dd6\\u2dd8-\\u2dde\\u2e2f\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303c\\u3041-\\u3096\\u309d-\\u309f\\u30a1-\\u30fa\\u30fc-\\u30ff\\u3105-\\u312d\\u3131-\\u318e\\u31a0-\\u31ba\\u31f0-\\u31ff\\u3400-\\u4db5\\u4e00-\\u9fcc\\ua000-\\ua48c\\ua4d0-\\ua4fd\\ua500-\\ua60c\\ua610-\\ua61f\\ua62a\\ua62b\\ua640-\\ua66e\\ua67f-\\ua697\\ua6a0-\\ua6ef\\ua717-\\ua71f\\ua722-\\ua788\\ua78b-\\ua78e\\ua790-\\ua793\\ua7a0-\\ua7aa\\ua7f8-\\ua801\\ua803-\\ua805\\ua807-\\ua80a\\ua80c-\\ua822\\ua840-\\ua873\\ua882-\\ua8b3\\ua8f2-\\ua8f7\\ua8fb\\ua90a-\\ua925\\ua930-\\ua946\\ua960-\\ua97c\\ua984-\\ua9b2\\ua9cf\\uaa00-\\uaa28\\uaa40-\\uaa42\\uaa44-\\uaa4b\\uaa60-\\uaa76\\uaa7a\\uaa80-\\uaaaf\\uaab1\\uaab5\\uaab6\\uaab9-\\uaabd\\uaac0\\uaac2\\uaadb-\\uaadd\\uaae0-\\uaaea\\uaaf2-\\uaaf4\\uab01-\\uab06\\uab09-\\uab0e\\uab11-\\uab16\\uab20-\\uab26\\uab28-\\uab2e\\uabc0-\\uabe2\\uac00-\\ud7a3\\ud7b0-\\ud7c6\\ud7cb-\\ud7fb\\uf900-\\ufa6d\\ufa70-\\ufad9\\ufb00-\\ufb06\\ufb13-\\ufb17\\ufb1d\\ufb1f-\\ufb28\\ufb2a-\\ufb36\\ufb38-\\ufb3c\\ufb3e\\ufb40\\ufb41\\ufb43\\ufb44\\ufb46-\\ufbb1\\ufbd3-\\ufd3d\\ufd50-\\ufd8f\\ufd92-\\ufdc7\\ufdf0-\\ufdfb\\ufe70-\\ufe74\\ufe76-\\ufefc\\uff21-\\uff3a\\uff41-\\uff5a\\uff66-\\uffbe\\uffc2-\\uffc7\\uffca-\\uffcf\\uffd2-\\uffd7\\uffda-\\uffdc";
  var nonASCIIidentifierChars = "\\u0300-\\u036f\\u0483-\\u0487\\u0591-\\u05bd\\u05bf\\u05c1\\u05c2\\u05c4\\u05c5\\u05c7\\u0610-\\u061a\\u0620-\\u0649\\u0672-\\u06d3\\u06e7-\\u06e8\\u06fb-\\u06fc\\u0730-\\u074a\\u0800-\\u0814\\u081b-\\u0823\\u0825-\\u0827\\u0829-\\u082d\\u0840-\\u0857\\u08e4-\\u08fe\\u0900-\\u0903\\u093a-\\u093c\\u093e-\\u094f\\u0951-\\u0957\\u0962-\\u0963\\u0966-\\u096f\\u0981-\\u0983\\u09bc\\u09be-\\u09c4\\u09c7\\u09c8\\u09d7\\u09df-\\u09e0\\u0a01-\\u0a03\\u0a3c\\u0a3e-\\u0a42\\u0a47\\u0a48\\u0a4b-\\u0a4d\\u0a51\\u0a66-\\u0a71\\u0a75\\u0a81-\\u0a83\\u0abc\\u0abe-\\u0ac5\\u0ac7-\\u0ac9\\u0acb-\\u0acd\\u0ae2-\\u0ae3\\u0ae6-\\u0aef\\u0b01-\\u0b03\\u0b3c\\u0b3e-\\u0b44\\u0b47\\u0b48\\u0b4b-\\u0b4d\\u0b56\\u0b57\\u0b5f-\\u0b60\\u0b66-\\u0b6f\\u0b82\\u0bbe-\\u0bc2\\u0bc6-\\u0bc8\\u0bca-\\u0bcd\\u0bd7\\u0be6-\\u0bef\\u0c01-\\u0c03\\u0c46-\\u0c48\\u0c4a-\\u0c4d\\u0c55\\u0c56\\u0c62-\\u0c63\\u0c66-\\u0c6f\\u0c82\\u0c83\\u0cbc\\u0cbe-\\u0cc4\\u0cc6-\\u0cc8\\u0cca-\\u0ccd\\u0cd5\\u0cd6\\u0ce2-\\u0ce3\\u0ce6-\\u0cef\\u0d02\\u0d03\\u0d46-\\u0d48\\u0d57\\u0d62-\\u0d63\\u0d66-\\u0d6f\\u0d82\\u0d83\\u0dca\\u0dcf-\\u0dd4\\u0dd6\\u0dd8-\\u0ddf\\u0df2\\u0df3\\u0e34-\\u0e3a\\u0e40-\\u0e45\\u0e50-\\u0e59\\u0eb4-\\u0eb9\\u0ec8-\\u0ecd\\u0ed0-\\u0ed9\\u0f18\\u0f19\\u0f20-\\u0f29\\u0f35\\u0f37\\u0f39\\u0f41-\\u0f47\\u0f71-\\u0f84\\u0f86-\\u0f87\\u0f8d-\\u0f97\\u0f99-\\u0fbc\\u0fc6\\u1000-\\u1029\\u1040-\\u1049\\u1067-\\u106d\\u1071-\\u1074\\u1082-\\u108d\\u108f-\\u109d\\u135d-\\u135f\\u170e-\\u1710\\u1720-\\u1730\\u1740-\\u1750\\u1772\\u1773\\u1780-\\u17b2\\u17dd\\u17e0-\\u17e9\\u180b-\\u180d\\u1810-\\u1819\\u1920-\\u192b\\u1930-\\u193b\\u1951-\\u196d\\u19b0-\\u19c0\\u19c8-\\u19c9\\u19d0-\\u19d9\\u1a00-\\u1a15\\u1a20-\\u1a53\\u1a60-\\u1a7c\\u1a7f-\\u1a89\\u1a90-\\u1a99\\u1b46-\\u1b4b\\u1b50-\\u1b59\\u1b6b-\\u1b73\\u1bb0-\\u1bb9\\u1be6-\\u1bf3\\u1c00-\\u1c22\\u1c40-\\u1c49\\u1c5b-\\u1c7d\\u1cd0-\\u1cd2\\u1d00-\\u1dbe\\u1e01-\\u1f15\\u200c\\u200d\\u203f\\u2040\\u2054\\u20d0-\\u20dc\\u20e1\\u20e5-\\u20f0\\u2d81-\\u2d96\\u2de0-\\u2dff\\u3021-\\u3028\\u3099\\u309a\\ua640-\\ua66d\\ua674-\\ua67d\\ua69f\\ua6f0-\\ua6f1\\ua7f8-\\ua800\\ua806\\ua80b\\ua823-\\ua827\\ua880-\\ua881\\ua8b4-\\ua8c4\\ua8d0-\\ua8d9\\ua8f3-\\ua8f7\\ua900-\\ua909\\ua926-\\ua92d\\ua930-\\ua945\\ua980-\\ua983\\ua9b3-\\ua9c0\\uaa00-\\uaa27\\uaa40-\\uaa41\\uaa4c-\\uaa4d\\uaa50-\\uaa59\\uaa7b\\uaae0-\\uaae9\\uaaf2-\\uaaf3\\uabc0-\\uabe1\\uabec\\uabed\\uabf0-\\uabf9\\ufb20-\\ufb28\\ufe00-\\ufe0f\\ufe20-\\ufe26\\ufe33\\ufe34\\ufe4d-\\ufe4f\\uff10-\\uff19\\uff3f";
  //var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
  //var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");

  var identifierStart = "(?:\\\\u[0-9a-fA-F]{4}|[" + baseASCIIidentifierStartChars + nonASCIIidentifierStartChars + "])";
  var identifierChars = "(?:\\\\u[0-9a-fA-F]{4}|[" + baseASCIIidentifierChars + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "])*";

  exports.identifier = new RegExp(identifierStart + identifierChars, 'g');
  exports.identifierStart = new RegExp(identifierStart);
  exports.identifierMatch = new RegExp("(?:\\\\u[0-9a-fA-F]{4}|[" + baseASCIIidentifierChars + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "])+");

  // Whether a single character denotes a newline.

  exports.newline = /[\n\r\u2028\u2029]/;

  // Matches a whole line break (where CRLF is considered a single
  // line break). Used to count lines.

  // in javascript, these two differ
  // in python they are the same, different methods are called on them
  exports.lineBreak = new RegExp('\r\n|' + exports.newline.source);
  exports.allLineBreaks = new RegExp(exports.lineBreak.source, 'g');
  });

  /*jshint node:true */

  function Options(options, merge_child_field) {
    this.raw_options = _mergeOpts(options, merge_child_field);

    // Support passing the source text back with no change
    this.disabled = this._get_boolean('disabled');

    this.eol = this._get_characters('eol', 'auto');
    this.end_with_newline = this._get_boolean('end_with_newline');
    this.indent_size = this._get_number('indent_size', 4);
    this.indent_char = this._get_characters('indent_char', ' ');
    this.indent_level = this._get_number('indent_level');

    this.preserve_newlines = this._get_boolean('preserve_newlines', true);
    this.max_preserve_newlines = this._get_number('max_preserve_newlines', 32786);
    if (!this.preserve_newlines) {
      this.max_preserve_newlines = 0;
    }

    this.indent_with_tabs = this._get_boolean('indent_with_tabs', this.indent_char === '\t');
    if (this.indent_with_tabs) {
      this.indent_char = '\t';

      // indent_size behavior changed after 1.8.6
      // It used to be that indent_size would be
      // set to 1 for indent_with_tabs. That is no longer needed and
      // actually doesn't make sense - why not use spaces? Further,
      // that might produce unexpected behavior - tabs being used
      // for single-column alignment. So, when indent_with_tabs is true
      // and indent_size is 1, reset indent_size to 4.
      if (this.indent_size === 1) {
        this.indent_size = 4;
      }
    }

    // Backwards compat with 1.3.x
    this.wrap_line_length = this._get_number('wrap_line_length', this._get_number('max_char'));

    this.indent_empty_lines = this._get_boolean('indent_empty_lines');

    // valid templating languages ['django', 'erb', 'handlebars', 'php']
    // For now, 'auto' = all off for javascript, all on for html (and inline javascript).
    // other values ignored
    this.templating = this._get_selection_list('templating', ['auto', 'none', 'django', 'erb', 'handlebars', 'php'], ['auto']);
  }

  Options.prototype._get_array = function(name, default_value) {
    var option_value = this.raw_options[name];
    var result = default_value || [];
    if (typeof option_value === 'object') {
      if (option_value !== null && typeof option_value.concat === 'function') {
        result = option_value.concat();
      }
    } else if (typeof option_value === 'string') {
      result = option_value.split(/[^a-zA-Z0-9_\/\-]+/);
    }
    return result;
  };

  Options.prototype._get_boolean = function(name, default_value) {
    var option_value = this.raw_options[name];
    var result = option_value === undefined ? !!default_value : !!option_value;
    return result;
  };

  Options.prototype._get_characters = function(name, default_value) {
    var option_value = this.raw_options[name];
    var result = default_value || '';
    if (typeof option_value === 'string') {
      result = option_value.replace(/\\r/, '\r').replace(/\\n/, '\n').replace(/\\t/, '\t');
    }
    return result;
  };

  Options.prototype._get_number = function(name, default_value) {
    var option_value = this.raw_options[name];
    default_value = parseInt(default_value, 10);
    if (isNaN(default_value)) {
      default_value = 0;
    }
    var result = parseInt(option_value, 10);
    if (isNaN(result)) {
      result = default_value;
    }
    return result;
  };

  Options.prototype._get_selection = function(name, selection_list, default_value) {
    var result = this._get_selection_list(name, selection_list, default_value);
    if (result.length !== 1) {
      throw new Error(
        "Invalid Option Value: The option '" + name + "' can only be one of the following values:\n" +
        selection_list + "\nYou passed in: '" + this.raw_options[name] + "'");
    }

    return result[0];
  };


  Options.prototype._get_selection_list = function(name, selection_list, default_value) {
    if (!selection_list || selection_list.length === 0) {
      throw new Error("Selection list cannot be empty.");
    }

    default_value = default_value || [selection_list[0]];
    if (!this._is_valid_selection(default_value, selection_list)) {
      throw new Error("Invalid Default Value!");
    }

    var result = this._get_array(name, default_value);
    if (!this._is_valid_selection(result, selection_list)) {
      throw new Error(
        "Invalid Option Value: The option '" + name + "' can contain only the following values:\n" +
        selection_list + "\nYou passed in: '" + this.raw_options[name] + "'");
    }

    return result;
  };

  Options.prototype._is_valid_selection = function(result, selection_list) {
    return result.length && selection_list.length &&
      !result.some(function(item) { return selection_list.indexOf(item) === -1; });
  };


  // merges child options up with the parent options object
  // Example: obj = {a: 1, b: {a: 2}}
  //          mergeOpts(obj, 'b')
  //
  //          Returns: {a: 2}
  function _mergeOpts(allOptions, childFieldName) {
    var finalOpts = {};
    allOptions = _normalizeOpts(allOptions);
    var name;

    for (name in allOptions) {
      if (name !== childFieldName) {
        finalOpts[name] = allOptions[name];
      }
    }

    //merge in the per type settings for the childFieldName
    if (childFieldName && allOptions[childFieldName]) {
      for (name in allOptions[childFieldName]) {
        finalOpts[name] = allOptions[childFieldName][name];
      }
    }
    return finalOpts;
  }

  function _normalizeOpts(options) {
    var convertedOpts = {};
    var key;

    for (key in options) {
      var newKey = key.replace(/-/g, "_");
      convertedOpts[newKey] = options[key];
    }
    return convertedOpts;
  }

  var Options_1 = Options;
  var normalizeOpts = _normalizeOpts;
  var mergeOpts = _mergeOpts;

  var options = {
  	Options: Options_1,
  	normalizeOpts: normalizeOpts,
  	mergeOpts: mergeOpts
  };

  var BaseOptions = options.Options;

  var validPositionValues = ['before-newline', 'after-newline', 'preserve-newline'];

  function Options$1(options) {
    BaseOptions.call(this, options, 'js');

    // compatibility, re
    var raw_brace_style = this.raw_options.brace_style || null;
    if (raw_brace_style === "expand-strict") { //graceful handling of deprecated option
      this.raw_options.brace_style = "expand";
    } else if (raw_brace_style === "collapse-preserve-inline") { //graceful handling of deprecated option
      this.raw_options.brace_style = "collapse,preserve-inline";
    } else if (this.raw_options.braces_on_own_line !== undefined) { //graceful handling of deprecated option
      this.raw_options.brace_style = this.raw_options.braces_on_own_line ? "expand" : "collapse";
      // } else if (!raw_brace_style) { //Nothing exists to set it
      //   raw_brace_style = "collapse";
    }

    //preserve-inline in delimited string will trigger brace_preserve_inline, everything
    //else is considered a brace_style and the last one only will have an effect

    var brace_style_split = this._get_selection_list('brace_style', ['collapse', 'expand', 'end-expand', 'none', 'preserve-inline']);

    this.brace_preserve_inline = false; //Defaults in case one or other was not specified in meta-option
    this.brace_style = "collapse";

    for (var bs = 0; bs < brace_style_split.length; bs++) {
      if (brace_style_split[bs] === "preserve-inline") {
        this.brace_preserve_inline = true;
      } else {
        this.brace_style = brace_style_split[bs];
      }
    }

    this.unindent_chained_methods = this._get_boolean('unindent_chained_methods');
    this.break_chained_methods = this._get_boolean('break_chained_methods');
    this.space_in_paren = this._get_boolean('space_in_paren');
    this.space_in_empty_paren = this._get_boolean('space_in_empty_paren');
    this.jslint_happy = this._get_boolean('jslint_happy');
    this.space_after_anon_function = this._get_boolean('space_after_anon_function');
    this.space_after_named_function = this._get_boolean('space_after_named_function');
    this.keep_array_indentation = this._get_boolean('keep_array_indentation');
    this.space_before_conditional = this._get_boolean('space_before_conditional', true);
    this.unescape_strings = this._get_boolean('unescape_strings');
    this.e4x = this._get_boolean('e4x');
    this.comma_first = this._get_boolean('comma_first');
    this.operator_position = this._get_selection('operator_position', validPositionValues);

    // For testing of beautify preserve:start directive
    this.test_output_raw = this._get_boolean('test_output_raw');

    // force this._options.space_after_anon_function to true if this._options.jslint_happy
    if (this.jslint_happy) {
      this.space_after_anon_function = true;
    }

  }
  Options$1.prototype = new BaseOptions();



  var Options_1$1 = Options$1;

  var options$1 = {
  	Options: Options_1$1
  };

  /*jshint node:true */

  var regexp_has_sticky = RegExp.prototype.hasOwnProperty('sticky');

  function InputScanner(input_string) {
    this.__input = input_string || '';
    this.__input_length = this.__input.length;
    this.__position = 0;
  }

  InputScanner.prototype.restart = function() {
    this.__position = 0;
  };

  InputScanner.prototype.back = function() {
    if (this.__position > 0) {
      this.__position -= 1;
    }
  };

  InputScanner.prototype.hasNext = function() {
    return this.__position < this.__input_length;
  };

  InputScanner.prototype.next = function() {
    var val = null;
    if (this.hasNext()) {
      val = this.__input.charAt(this.__position);
      this.__position += 1;
    }
    return val;
  };

  InputScanner.prototype.peek = function(index) {
    var val = null;
    index = index || 0;
    index += this.__position;
    if (index >= 0 && index < this.__input_length) {
      val = this.__input.charAt(index);
    }
    return val;
  };

  // This is a JavaScript only helper function (not in python)
  // Javascript doesn't have a match method
  // and not all implementation support "sticky" flag.
  // If they do not support sticky then both this.match() and this.test() method
  // must get the match and check the index of the match.
  // If sticky is supported and set, this method will use it.
  // Otherwise it will check that global is set, and fall back to the slower method.
  InputScanner.prototype.__match = function(pattern, index) {
    pattern.lastIndex = index;
    var pattern_match = pattern.exec(this.__input);

    if (pattern_match && !(regexp_has_sticky && pattern.sticky)) {
      if (pattern_match.index !== index) {
        pattern_match = null;
      }
    }

    return pattern_match;
  };

  InputScanner.prototype.test = function(pattern, index) {
    index = index || 0;
    index += this.__position;

    if (index >= 0 && index < this.__input_length) {
      return !!this.__match(pattern, index);
    } else {
      return false;
    }
  };

  InputScanner.prototype.testChar = function(pattern, index) {
    // test one character regex match
    var val = this.peek(index);
    pattern.lastIndex = 0;
    return val !== null && pattern.test(val);
  };

  InputScanner.prototype.match = function(pattern) {
    var pattern_match = this.__match(pattern, this.__position);
    if (pattern_match) {
      this.__position += pattern_match[0].length;
    } else {
      pattern_match = null;
    }
    return pattern_match;
  };

  InputScanner.prototype.read = function(starting_pattern, until_pattern, until_after) {
    var val = '';
    var match;
    if (starting_pattern) {
      match = this.match(starting_pattern);
      if (match) {
        val += match[0];
      }
    }
    if (until_pattern && (match || !starting_pattern)) {
      val += this.readUntil(until_pattern, until_after);
    }
    return val;
  };

  InputScanner.prototype.readUntil = function(pattern, until_after) {
    var val = '';
    var match_index = this.__position;
    pattern.lastIndex = this.__position;
    var pattern_match = pattern.exec(this.__input);
    if (pattern_match) {
      match_index = pattern_match.index;
      if (until_after) {
        match_index += pattern_match[0].length;
      }
    } else {
      match_index = this.__input_length;
    }

    val = this.__input.substring(this.__position, match_index);
    this.__position = match_index;
    return val;
  };

  InputScanner.prototype.readUntilAfter = function(pattern) {
    return this.readUntil(pattern, true);
  };

  InputScanner.prototype.get_regexp = function(pattern, match_from) {
    var result = null;
    var flags = 'g';
    if (match_from && regexp_has_sticky) {
      flags = 'y';
    }
    // strings are converted to regexp
    if (typeof pattern === "string" && pattern !== '') {
      // result = new RegExp(pattern.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'), flags);
      result = new RegExp(pattern, flags);
    } else if (pattern) {
      result = new RegExp(pattern.source, flags);
    }
    return result;
  };

  InputScanner.prototype.get_literal_regexp = function(literal_string) {
    return RegExp(literal_string.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'));
  };

  /* css beautifier legacy helpers */
  InputScanner.prototype.peekUntilAfter = function(pattern) {
    var start = this.__position;
    var val = this.readUntilAfter(pattern);
    this.__position = start;
    return val;
  };

  InputScanner.prototype.lookBack = function(testVal) {
    var start = this.__position - 1;
    return start >= testVal.length && this.__input.substring(start - testVal.length, start)
      .toLowerCase() === testVal;
  };

  var InputScanner_1 = InputScanner;

  var inputscanner = {
  	InputScanner: InputScanner_1
  };

  /*jshint node:true */

  function TokenStream(parent_token) {
    // private
    this.__tokens = [];
    this.__tokens_length = this.__tokens.length;
    this.__position = 0;
    this.__parent_token = parent_token;
  }

  TokenStream.prototype.restart = function() {
    this.__position = 0;
  };

  TokenStream.prototype.isEmpty = function() {
    return this.__tokens_length === 0;
  };

  TokenStream.prototype.hasNext = function() {
    return this.__position < this.__tokens_length;
  };

  TokenStream.prototype.next = function() {
    var val = null;
    if (this.hasNext()) {
      val = this.__tokens[this.__position];
      this.__position += 1;
    }
    return val;
  };

  TokenStream.prototype.peek = function(index) {
    var val = null;
    index = index || 0;
    index += this.__position;
    if (index >= 0 && index < this.__tokens_length) {
      val = this.__tokens[index];
    }
    return val;
  };

  TokenStream.prototype.add = function(token) {
    if (this.__parent_token) {
      token.parent = this.__parent_token;
    }
    this.__tokens.push(token);
    this.__tokens_length += 1;
  };

  var TokenStream_1 = TokenStream;

  var tokenstream = {
  	TokenStream: TokenStream_1
  };

  /*jshint node:true */

  function Pattern(input_scanner, parent) {
    this._input = input_scanner;
    this._starting_pattern = null;
    this._match_pattern = null;
    this._until_pattern = null;
    this._until_after = false;

    if (parent) {
      this._starting_pattern = this._input.get_regexp(parent._starting_pattern, true);
      this._match_pattern = this._input.get_regexp(parent._match_pattern, true);
      this._until_pattern = this._input.get_regexp(parent._until_pattern);
      this._until_after = parent._until_after;
    }
  }

  Pattern.prototype.read = function() {
    var result = this._input.read(this._starting_pattern);
    if (!this._starting_pattern || result) {
      result += this._input.read(this._match_pattern, this._until_pattern, this._until_after);
    }
    return result;
  };

  Pattern.prototype.read_match = function() {
    return this._input.match(this._match_pattern);
  };

  Pattern.prototype.until_after = function(pattern) {
    var result = this._create();
    result._until_after = true;
    result._until_pattern = this._input.get_regexp(pattern);
    result._update();
    return result;
  };

  Pattern.prototype.until = function(pattern) {
    var result = this._create();
    result._until_after = false;
    result._until_pattern = this._input.get_regexp(pattern);
    result._update();
    return result;
  };

  Pattern.prototype.starting_with = function(pattern) {
    var result = this._create();
    result._starting_pattern = this._input.get_regexp(pattern, true);
    result._update();
    return result;
  };

  Pattern.prototype.matching = function(pattern) {
    var result = this._create();
    result._match_pattern = this._input.get_regexp(pattern, true);
    result._update();
    return result;
  };

  Pattern.prototype._create = function() {
    return new Pattern(this._input, this);
  };

  Pattern.prototype._update = function() {};

  var Pattern_1 = Pattern;

  var pattern = {
  	Pattern: Pattern_1
  };

  var Pattern$1 = pattern.Pattern;

  function WhitespacePattern(input_scanner, parent) {
    Pattern$1.call(this, input_scanner, parent);
    if (parent) {
      this._line_regexp = this._input.get_regexp(parent._line_regexp);
    } else {
      this.__set_whitespace_patterns('', '');
    }

    this.newline_count = 0;
    this.whitespace_before_token = '';
  }
  WhitespacePattern.prototype = new Pattern$1();

  WhitespacePattern.prototype.__set_whitespace_patterns = function(whitespace_chars, newline_chars) {
    whitespace_chars += '\\t ';
    newline_chars += '\\n\\r';

    this._match_pattern = this._input.get_regexp(
      '[' + whitespace_chars + newline_chars + ']+', true);
    this._newline_regexp = this._input.get_regexp(
      '\\r\\n|[' + newline_chars + ']');
  };

  WhitespacePattern.prototype.read = function() {
    this.newline_count = 0;
    this.whitespace_before_token = '';

    var resulting_string = this._input.read(this._match_pattern);
    if (resulting_string === ' ') {
      this.whitespace_before_token = ' ';
    } else if (resulting_string) {
      var matches = this.__split(this._newline_regexp, resulting_string);
      this.newline_count = matches.length - 1;
      this.whitespace_before_token = matches[this.newline_count];
    }

    return resulting_string;
  };

  WhitespacePattern.prototype.matching = function(whitespace_chars, newline_chars) {
    var result = this._create();
    result.__set_whitespace_patterns(whitespace_chars, newline_chars);
    result._update();
    return result;
  };

  WhitespacePattern.prototype._create = function() {
    return new WhitespacePattern(this._input, this);
  };

  WhitespacePattern.prototype.__split = function(regexp, input_string) {
    regexp.lastIndex = 0;
    var start_index = 0;
    var result = [];
    var next_match = regexp.exec(input_string);
    while (next_match) {
      result.push(input_string.substring(start_index, next_match.index));
      start_index = next_match.index + next_match[0].length;
      next_match = regexp.exec(input_string);
    }

    if (start_index < input_string.length) {
      result.push(input_string.substring(start_index, input_string.length));
    } else {
      result.push('');
    }

    return result;
  };



  var WhitespacePattern_1 = WhitespacePattern;

  var whitespacepattern = {
  	WhitespacePattern: WhitespacePattern_1
  };

  var InputScanner$1 = inputscanner.InputScanner;
  var Token$1 = token.Token;
  var TokenStream$1 = tokenstream.TokenStream;
  var WhitespacePattern$1 = whitespacepattern.WhitespacePattern;

  var TOKEN = {
    START: 'TK_START',
    RAW: 'TK_RAW',
    EOF: 'TK_EOF'
  };

  var Tokenizer = function(input_string, options) {
    this._input = new InputScanner$1(input_string);
    this._options = options || {};
    this.__tokens = null;

    this._patterns = {};
    this._patterns.whitespace = new WhitespacePattern$1(this._input);
  };

  Tokenizer.prototype.tokenize = function() {
    this._input.restart();
    this.__tokens = new TokenStream$1();

    this._reset();

    var current;
    var previous = new Token$1(TOKEN.START, '');
    var open_token = null;
    var open_stack = [];
    var comments = new TokenStream$1();

    while (previous.type !== TOKEN.EOF) {
      current = this._get_next_token(previous, open_token);
      while (this._is_comment(current)) {
        comments.add(current);
        current = this._get_next_token(previous, open_token);
      }

      if (!comments.isEmpty()) {
        current.comments_before = comments;
        comments = new TokenStream$1();
      }

      current.parent = open_token;

      if (this._is_opening(current)) {
        open_stack.push(open_token);
        open_token = current;
      } else if (open_token && this._is_closing(current, open_token)) {
        current.opened = open_token;
        open_token.closed = current;
        open_token = open_stack.pop();
        current.parent = open_token;
      }

      current.previous = previous;
      previous.next = current;

      this.__tokens.add(current);
      previous = current;
    }

    return this.__tokens;
  };


  Tokenizer.prototype._is_first_token = function() {
    return this.__tokens.isEmpty();
  };

  Tokenizer.prototype._reset = function() {};

  Tokenizer.prototype._get_next_token = function(previous_token, open_token) { // jshint unused:false
    this._readWhitespace();
    var resulting_string = this._input.read(/.+/g);
    if (resulting_string) {
      return this._create_token(TOKEN.RAW, resulting_string);
    } else {
      return this._create_token(TOKEN.EOF, '');
    }
  };

  Tokenizer.prototype._is_comment = function(current_token) { // jshint unused:false
    return false;
  };

  Tokenizer.prototype._is_opening = function(current_token) { // jshint unused:false
    return false;
  };

  Tokenizer.prototype._is_closing = function(current_token, open_token) { // jshint unused:false
    return false;
  };

  Tokenizer.prototype._create_token = function(type, text) {
    var token = new Token$1(type, text,
      this._patterns.whitespace.newline_count,
      this._patterns.whitespace.whitespace_before_token);
    return token;
  };

  Tokenizer.prototype._readWhitespace = function() {
    return this._patterns.whitespace.read();
  };



  var Tokenizer_1 = Tokenizer;
  var TOKEN_1 = TOKEN;

  var tokenizer = {
  	Tokenizer: Tokenizer_1,
  	TOKEN: TOKEN_1
  };

  /*jshint node:true */

  function Directives(start_block_pattern, end_block_pattern) {
    start_block_pattern = typeof start_block_pattern === 'string' ? start_block_pattern : start_block_pattern.source;
    end_block_pattern = typeof end_block_pattern === 'string' ? end_block_pattern : end_block_pattern.source;
    this.__directives_block_pattern = new RegExp(start_block_pattern + / beautify( \w+[:]\w+)+ /.source + end_block_pattern, 'g');
    this.__directive_pattern = / (\w+)[:](\w+)/g;

    this.__directives_end_ignore_pattern = new RegExp(start_block_pattern + /\sbeautify\signore:end\s/.source + end_block_pattern, 'g');
  }

  Directives.prototype.get_directives = function(text) {
    if (!text.match(this.__directives_block_pattern)) {
      return null;
    }

    var directives = {};
    this.__directive_pattern.lastIndex = 0;
    var directive_match = this.__directive_pattern.exec(text);

    while (directive_match) {
      directives[directive_match[1]] = directive_match[2];
      directive_match = this.__directive_pattern.exec(text);
    }

    return directives;
  };

  Directives.prototype.readIgnored = function(input) {
    return input.readUntilAfter(this.__directives_end_ignore_pattern);
  };


  var Directives_1 = Directives;

  var directives = {
  	Directives: Directives_1
  };

  var Pattern$2 = pattern.Pattern;


  var template_names = {
    django: false,
    erb: false,
    handlebars: false,
    php: false
  };

  // This lets templates appear anywhere we would do a readUntil
  // The cost is higher but it is pay to play.
  function TemplatablePattern(input_scanner, parent) {
    Pattern$2.call(this, input_scanner, parent);
    this.__template_pattern = null;
    this._disabled = Object.assign({}, template_names);
    this._excluded = Object.assign({}, template_names);

    if (parent) {
      this.__template_pattern = this._input.get_regexp(parent.__template_pattern);
      this._excluded = Object.assign(this._excluded, parent._excluded);
      this._disabled = Object.assign(this._disabled, parent._disabled);
    }
    var pattern = new Pattern$2(input_scanner);
    this.__patterns = {
      handlebars_comment: pattern.starting_with(/{{!--/).until_after(/--}}/),
      handlebars: pattern.starting_with(/{{/).until_after(/}}/),
      php: pattern.starting_with(/<\?(?:[=]|php)/).until_after(/\?>/),
      erb: pattern.starting_with(/<%[^%]/).until_after(/[^%]%>/),
      // django coflicts with handlebars a bit.
      django: pattern.starting_with(/{%/).until_after(/%}/),
      django_value: pattern.starting_with(/{{/).until_after(/}}/),
      django_comment: pattern.starting_with(/{#/).until_after(/#}/)
    };
  }
  TemplatablePattern.prototype = new Pattern$2();

  TemplatablePattern.prototype._create = function() {
    return new TemplatablePattern(this._input, this);
  };

  TemplatablePattern.prototype._update = function() {
    this.__set_templated_pattern();
  };

  TemplatablePattern.prototype.disable = function(language) {
    var result = this._create();
    result._disabled[language] = true;
    result._update();
    return result;
  };

  TemplatablePattern.prototype.read_options = function(options) {
    var result = this._create();
    for (var language in template_names) {
      result._disabled[language] = options.templating.indexOf(language) === -1;
    }
    result._update();
    return result;
  };

  TemplatablePattern.prototype.exclude = function(language) {
    var result = this._create();
    result._excluded[language] = true;
    result._update();
    return result;
  };

  TemplatablePattern.prototype.read = function() {
    var result = '';
    if (this._match_pattern) {
      result = this._input.read(this._starting_pattern);
    } else {
      result = this._input.read(this._starting_pattern, this.__template_pattern);
    }
    var next = this._read_template();
    while (next) {
      if (this._match_pattern) {
        next += this._input.read(this._match_pattern);
      } else {
        next += this._input.readUntil(this.__template_pattern);
      }
      result += next;
      next = this._read_template();
    }

    if (this._until_after) {
      result += this._input.readUntilAfter(this._until_pattern);
    }
    return result;
  };

  TemplatablePattern.prototype.__set_templated_pattern = function() {
    var items = [];

    if (!this._disabled.php) {
      items.push(this.__patterns.php._starting_pattern.source);
    }
    if (!this._disabled.handlebars) {
      items.push(this.__patterns.handlebars._starting_pattern.source);
    }
    if (!this._disabled.erb) {
      items.push(this.__patterns.erb._starting_pattern.source);
    }
    if (!this._disabled.django) {
      items.push(this.__patterns.django._starting_pattern.source);
      items.push(this.__patterns.django_value._starting_pattern.source);
      items.push(this.__patterns.django_comment._starting_pattern.source);
    }

    if (this._until_pattern) {
      items.push(this._until_pattern.source);
    }
    this.__template_pattern = this._input.get_regexp('(?:' + items.join('|') + ')');
  };

  TemplatablePattern.prototype._read_template = function() {
    var resulting_string = '';
    var c = this._input.peek();
    if (c === '<') {
      var peek1 = this._input.peek(1);
      //if we're in a comment, do something special
      // We treat all comments as literals, even more than preformatted tags
      // we just look for the appropriate close tag
      if (!this._disabled.php && !this._excluded.php && peek1 === '?') {
        resulting_string = resulting_string ||
          this.__patterns.php.read();
      }
      if (!this._disabled.erb && !this._excluded.erb && peek1 === '%') {
        resulting_string = resulting_string ||
          this.__patterns.erb.read();
      }
    } else if (c === '{') {
      if (!this._disabled.handlebars && !this._excluded.handlebars) {
        resulting_string = resulting_string ||
          this.__patterns.handlebars_comment.read();
        resulting_string = resulting_string ||
          this.__patterns.handlebars.read();
      }
      if (!this._disabled.django) {
        // django coflicts with handlebars a bit.
        if (!this._excluded.django && !this._excluded.handlebars) {
          resulting_string = resulting_string ||
            this.__patterns.django_value.read();
        }
        if (!this._excluded.django) {
          resulting_string = resulting_string ||
            this.__patterns.django_comment.read();
          resulting_string = resulting_string ||
            this.__patterns.django.read();
        }
      }
    }
    return resulting_string;
  };


  var TemplatablePattern_1 = TemplatablePattern;

  var templatablepattern = {
  	TemplatablePattern: TemplatablePattern_1
  };

  var InputScanner$2 = inputscanner.InputScanner;
  var BaseTokenizer = tokenizer.Tokenizer;
  var BASETOKEN = tokenizer.TOKEN;
  var Directives$1 = directives.Directives;

  var Pattern$3 = pattern.Pattern;
  var TemplatablePattern$1 = templatablepattern.TemplatablePattern;


  function in_array(what, arr) {
    return arr.indexOf(what) !== -1;
  }


  var TOKEN$1 = {
    START_EXPR: 'TK_START_EXPR',
    END_EXPR: 'TK_END_EXPR',
    START_BLOCK: 'TK_START_BLOCK',
    END_BLOCK: 'TK_END_BLOCK',
    WORD: 'TK_WORD',
    RESERVED: 'TK_RESERVED',
    SEMICOLON: 'TK_SEMICOLON',
    STRING: 'TK_STRING',
    EQUALS: 'TK_EQUALS',
    OPERATOR: 'TK_OPERATOR',
    COMMA: 'TK_COMMA',
    BLOCK_COMMENT: 'TK_BLOCK_COMMENT',
    COMMENT: 'TK_COMMENT',
    DOT: 'TK_DOT',
    UNKNOWN: 'TK_UNKNOWN',
    START: BASETOKEN.START,
    RAW: BASETOKEN.RAW,
    EOF: BASETOKEN.EOF
  };


  var directives_core = new Directives$1(/\/\*/, /\*\//);

  var number_pattern = /0[xX][0123456789abcdefABCDEF]*|0[oO][01234567]*|0[bB][01]*|\d+n|(?:\.\d+|\d+\.?\d*)(?:[eE][+-]?\d+)?/;

  var digit = /[0-9]/;

  // Dot "." must be distinguished from "..." and decimal
  var dot_pattern = /[^\d\.]/;

  var positionable_operators = (
    ">>> === !== " +
    "<< && >= ** != == <= >> || " +
    "< / - + > : & % ? ^ | *").split(' ');

  // IMPORTANT: this must be sorted longest to shortest or tokenizing many not work.
  // Also, you must update possitionable operators separately from punct
  var punct =
    ">>>= " +
    "... >>= <<= === >>> !== **= " +
    "=> ^= :: /= << <= == && -= >= >> != -- += ** || ++ %= &= *= |= " +
    "= ! ? > < : / ^ - + * & % ~ |";

  punct = punct.replace(/[-[\]{}()*+?.,\\^$|#]/g, "\\$&");
  punct = punct.replace(/ /g, '|');

  var punct_pattern = new RegExp(punct);

  // words which should always start on new line.
  var line_starters = 'continue,try,throw,return,var,let,const,if,switch,case,default,for,while,break,function,import,export'.split(',');
  var reserved_words = line_starters.concat(['do', 'in', 'of', 'else', 'get', 'set', 'new', 'catch', 'finally', 'typeof', 'yield', 'async', 'await', 'from', 'as']);
  var reserved_word_pattern = new RegExp('^(?:' + reserved_words.join('|') + ')$');

  // var template_pattern = /(?:(?:<\?php|<\?=)[\s\S]*?\?>)|(?:<%[\s\S]*?%>)/g;

  var in_html_comment;

  var Tokenizer$1 = function(input_string, options) {
    BaseTokenizer.call(this, input_string, options);

    this._patterns.whitespace = this._patterns.whitespace.matching(
      /\u00A0\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff/.source,
      /\u2028\u2029/.source);

    var pattern_reader = new Pattern$3(this._input);
    var templatable = new TemplatablePattern$1(this._input)
      .read_options(this._options);

    this.__patterns = {
      template: templatable,
      identifier: templatable.starting_with(acorn.identifier).matching(acorn.identifierMatch),
      number: pattern_reader.matching(number_pattern),
      punct: pattern_reader.matching(punct_pattern),
      // comment ends just before nearest linefeed or end of file
      comment: pattern_reader.starting_with(/\/\//).until(/[\n\r\u2028\u2029]/),
      //  /* ... */ comment ends with nearest */ or end of file
      block_comment: pattern_reader.starting_with(/\/\*/).until_after(/\*\//),
      html_comment_start: pattern_reader.matching(/<!--/),
      html_comment_end: pattern_reader.matching(/-->/),
      include: pattern_reader.starting_with(/#include/).until_after(acorn.lineBreak),
      shebang: pattern_reader.starting_with(/#!/).until_after(acorn.lineBreak),
      xml: pattern_reader.matching(/[\s\S]*?<(\/?)([-a-zA-Z:0-9_.]+|{[\s\S]+?}|!\[CDATA\[[\s\S]*?\]\])(\s+{[\s\S]+?}|\s+[-a-zA-Z:0-9_.]+|\s+[-a-zA-Z:0-9_.]+\s*=\s*('[^']*'|"[^"]*"|{[\s\S]+?}))*\s*(\/?)\s*>/),
      single_quote: templatable.until(/['\\\n\r\u2028\u2029]/),
      double_quote: templatable.until(/["\\\n\r\u2028\u2029]/),
      template_text: templatable.until(/[`\\$]/),
      template_expression: templatable.until(/[`}\\]/)
    };

  };
  Tokenizer$1.prototype = new BaseTokenizer();

  Tokenizer$1.prototype._is_comment = function(current_token) {
    return current_token.type === TOKEN$1.COMMENT || current_token.type === TOKEN$1.BLOCK_COMMENT || current_token.type === TOKEN$1.UNKNOWN;
  };

  Tokenizer$1.prototype._is_opening = function(current_token) {
    return current_token.type === TOKEN$1.START_BLOCK || current_token.type === TOKEN$1.START_EXPR;
  };

  Tokenizer$1.prototype._is_closing = function(current_token, open_token) {
    return (current_token.type === TOKEN$1.END_BLOCK || current_token.type === TOKEN$1.END_EXPR) &&
      (open_token && (
        (current_token.text === ']' && open_token.text === '[') ||
        (current_token.text === ')' && open_token.text === '(') ||
        (current_token.text === '}' && open_token.text === '{')));
  };

  Tokenizer$1.prototype._reset = function() {
    in_html_comment = false;
  };

  Tokenizer$1.prototype._get_next_token = function(previous_token, open_token) { // jshint unused:false
    var token = null;
    this._readWhitespace();
    var c = this._input.peek();

    if (c === null) {
      return this._create_token(TOKEN$1.EOF, '');
    }

    token = token || this._read_string(c);
    token = token || this._read_word(previous_token);
    token = token || this._read_singles(c);
    token = token || this._read_comment(c);
    token = token || this._read_regexp(c, previous_token);
    token = token || this._read_xml(c, previous_token);
    token = token || this._read_non_javascript(c);
    token = token || this._read_punctuation();
    token = token || this._create_token(TOKEN$1.UNKNOWN, this._input.next());

    return token;
  };

  Tokenizer$1.prototype._read_word = function(previous_token) {
    var resulting_string;
    resulting_string = this.__patterns.identifier.read();
    if (resulting_string !== '') {
      resulting_string = resulting_string.replace(acorn.allLineBreaks, '\n');
      if (!(previous_token.type === TOKEN$1.DOT ||
          (previous_token.type === TOKEN$1.RESERVED && (previous_token.text === 'set' || previous_token.text === 'get'))) &&
        reserved_word_pattern.test(resulting_string)) {
        if (resulting_string === 'in' || resulting_string === 'of') { // hack for 'in' and 'of' operators
          return this._create_token(TOKEN$1.OPERATOR, resulting_string);
        }
        return this._create_token(TOKEN$1.RESERVED, resulting_string);
      }
      return this._create_token(TOKEN$1.WORD, resulting_string);
    }

    resulting_string = this.__patterns.number.read();
    if (resulting_string !== '') {
      return this._create_token(TOKEN$1.WORD, resulting_string);
    }
  };

  Tokenizer$1.prototype._read_singles = function(c) {
    var token = null;
    if (c === '(' || c === '[') {
      token = this._create_token(TOKEN$1.START_EXPR, c);
    } else if (c === ')' || c === ']') {
      token = this._create_token(TOKEN$1.END_EXPR, c);
    } else if (c === '{') {
      token = this._create_token(TOKEN$1.START_BLOCK, c);
    } else if (c === '}') {
      token = this._create_token(TOKEN$1.END_BLOCK, c);
    } else if (c === ';') {
      token = this._create_token(TOKEN$1.SEMICOLON, c);
    } else if (c === '.' && dot_pattern.test(this._input.peek(1))) {
      token = this._create_token(TOKEN$1.DOT, c);
    } else if (c === ',') {
      token = this._create_token(TOKEN$1.COMMA, c);
    }

    if (token) {
      this._input.next();
    }
    return token;
  };

  Tokenizer$1.prototype._read_punctuation = function() {
    var resulting_string = this.__patterns.punct.read();

    if (resulting_string !== '') {
      if (resulting_string === '=') {
        return this._create_token(TOKEN$1.EQUALS, resulting_string);
      } else {
        return this._create_token(TOKEN$1.OPERATOR, resulting_string);
      }
    }
  };

  Tokenizer$1.prototype._read_non_javascript = function(c) {
    var resulting_string = '';

    if (c === '#') {
      if (this._is_first_token()) {
        resulting_string = this.__patterns.shebang.read();

        if (resulting_string) {
          return this._create_token(TOKEN$1.UNKNOWN, resulting_string.trim() + '\n');
        }
      }

      // handles extendscript #includes
      resulting_string = this.__patterns.include.read();

      if (resulting_string) {
        return this._create_token(TOKEN$1.UNKNOWN, resulting_string.trim() + '\n');
      }

      c = this._input.next();

      // Spidermonkey-specific sharp variables for circular references. Considered obsolete.
      var sharp = '#';
      if (this._input.hasNext() && this._input.testChar(digit)) {
        do {
          c = this._input.next();
          sharp += c;
        } while (this._input.hasNext() && c !== '#' && c !== '=');
        if (c === '#') ; else if (this._input.peek() === '[' && this._input.peek(1) === ']') {
          sharp += '[]';
          this._input.next();
          this._input.next();
        } else if (this._input.peek() === '{' && this._input.peek(1) === '}') {
          sharp += '{}';
          this._input.next();
          this._input.next();
        }
        return this._create_token(TOKEN$1.WORD, sharp);
      }

      this._input.back();

    } else if (c === '<' && this._is_first_token()) {
      resulting_string = this.__patterns.html_comment_start.read();
      if (resulting_string) {
        while (this._input.hasNext() && !this._input.testChar(acorn.newline)) {
          resulting_string += this._input.next();
        }
        in_html_comment = true;
        return this._create_token(TOKEN$1.COMMENT, resulting_string);
      }
    } else if (in_html_comment && c === '-') {
      resulting_string = this.__patterns.html_comment_end.read();
      if (resulting_string) {
        in_html_comment = false;
        return this._create_token(TOKEN$1.COMMENT, resulting_string);
      }
    }

    return null;
  };

  Tokenizer$1.prototype._read_comment = function(c) {
    var token = null;
    if (c === '/') {
      var comment = '';
      if (this._input.peek(1) === '*') {
        // peek for comment /* ... */
        comment = this.__patterns.block_comment.read();
        var directives = directives_core.get_directives(comment);
        if (directives && directives.ignore === 'start') {
          comment += directives_core.readIgnored(this._input);
        }
        comment = comment.replace(acorn.allLineBreaks, '\n');
        token = this._create_token(TOKEN$1.BLOCK_COMMENT, comment);
        token.directives = directives;
      } else if (this._input.peek(1) === '/') {
        // peek for comment // ...
        comment = this.__patterns.comment.read();
        token = this._create_token(TOKEN$1.COMMENT, comment);
      }
    }
    return token;
  };

  Tokenizer$1.prototype._read_string = function(c) {
    if (c === '`' || c === "'" || c === '"') {
      var resulting_string = this._input.next();
      this.has_char_escapes = false;

      if (c === '`') {
        resulting_string += this._read_string_recursive('`', true, '${');
      } else {
        resulting_string += this._read_string_recursive(c);
      }

      if (this.has_char_escapes && this._options.unescape_strings) {
        resulting_string = unescape_string(resulting_string);
      }

      if (this._input.peek() === c) {
        resulting_string += this._input.next();
      }

      resulting_string = resulting_string.replace(acorn.allLineBreaks, '\n');

      return this._create_token(TOKEN$1.STRING, resulting_string);
    }

    return null;
  };

  Tokenizer$1.prototype._allow_regexp_or_xml = function(previous_token) {
    // regex and xml can only appear in specific locations during parsing
    return (previous_token.type === TOKEN$1.RESERVED && in_array(previous_token.text, ['return', 'case', 'throw', 'else', 'do', 'typeof', 'yield'])) ||
      (previous_token.type === TOKEN$1.END_EXPR && previous_token.text === ')' &&
        previous_token.opened.previous.type === TOKEN$1.RESERVED && in_array(previous_token.opened.previous.text, ['if', 'while', 'for'])) ||
      (in_array(previous_token.type, [TOKEN$1.COMMENT, TOKEN$1.START_EXPR, TOKEN$1.START_BLOCK, TOKEN$1.START,
        TOKEN$1.END_BLOCK, TOKEN$1.OPERATOR, TOKEN$1.EQUALS, TOKEN$1.EOF, TOKEN$1.SEMICOLON, TOKEN$1.COMMA
      ]));
  };

  Tokenizer$1.prototype._read_regexp = function(c, previous_token) {

    if (c === '/' && this._allow_regexp_or_xml(previous_token)) {
      // handle regexp
      //
      var resulting_string = this._input.next();
      var esc = false;

      var in_char_class = false;
      while (this._input.hasNext() &&
        ((esc || in_char_class || this._input.peek() !== c) &&
          !this._input.testChar(acorn.newline))) {
        resulting_string += this._input.peek();
        if (!esc) {
          esc = this._input.peek() === '\\';
          if (this._input.peek() === '[') {
            in_char_class = true;
          } else if (this._input.peek() === ']') {
            in_char_class = false;
          }
        } else {
          esc = false;
        }
        this._input.next();
      }

      if (this._input.peek() === c) {
        resulting_string += this._input.next();

        // regexps may have modifiers /regexp/MOD , so fetch those, too
        // Only [gim] are valid, but if the user puts in garbage, do what we can to take it.
        resulting_string += this._input.read(acorn.identifier);
      }
      return this._create_token(TOKEN$1.STRING, resulting_string);
    }
    return null;
  };

  Tokenizer$1.prototype._read_xml = function(c, previous_token) {

    if (this._options.e4x && c === "<" && this._allow_regexp_or_xml(previous_token)) {
      var xmlStr = '';
      var match = this.__patterns.xml.read_match();
      // handle e4x xml literals
      //
      if (match) {
        // Trim root tag to attempt to
        var rootTag = match[2].replace(/^{\s+/, '{').replace(/\s+}$/, '}');
        var isCurlyRoot = rootTag.indexOf('{') === 0;
        var depth = 0;
        while (match) {
          var isEndTag = !!match[1];
          var tagName = match[2];
          var isSingletonTag = (!!match[match.length - 1]) || (tagName.slice(0, 8) === "![CDATA[");
          if (!isSingletonTag &&
            (tagName === rootTag || (isCurlyRoot && tagName.replace(/^{\s+/, '{').replace(/\s+}$/, '}')))) {
            if (isEndTag) {
              --depth;
            } else {
              ++depth;
            }
          }
          xmlStr += match[0];
          if (depth <= 0) {
            break;
          }
          match = this.__patterns.xml.read_match();
        }
        // if we didn't close correctly, keep unformatted.
        if (!match) {
          xmlStr += this._input.match(/[\s\S]*/g)[0];
        }
        xmlStr = xmlStr.replace(acorn.allLineBreaks, '\n');
        return this._create_token(TOKEN$1.STRING, xmlStr);
      }
    }

    return null;
  };

  function unescape_string(s) {
    // You think that a regex would work for this
    // return s.replace(/\\x([0-9a-f]{2})/gi, function(match, val) {
    //         return String.fromCharCode(parseInt(val, 16));
    //     })
    // However, dealing with '\xff', '\\xff', '\\\xff' makes this more fun.
    var out = '',
      escaped = 0;

    var input_scan = new InputScanner$2(s);
    var matched = null;

    while (input_scan.hasNext()) {
      // Keep any whitespace, non-slash characters
      // also keep slash pairs.
      matched = input_scan.match(/([\s]|[^\\]|\\\\)+/g);

      if (matched) {
        out += matched[0];
      }

      if (input_scan.peek() === '\\') {
        input_scan.next();
        if (input_scan.peek() === 'x') {
          matched = input_scan.match(/x([0-9A-Fa-f]{2})/g);
        } else if (input_scan.peek() === 'u') {
          matched = input_scan.match(/u([0-9A-Fa-f]{4})/g);
        } else {
          out += '\\';
          if (input_scan.hasNext()) {
            out += input_scan.next();
          }
          continue;
        }

        // If there's some error decoding, return the original string
        if (!matched) {
          return s;
        }

        escaped = parseInt(matched[1], 16);

        if (escaped > 0x7e && escaped <= 0xff && matched[0].indexOf('x') === 0) {
          // we bail out on \x7f..\xff,
          // leaving whole string escaped,
          // as it's probably completely binary
          return s;
        } else if (escaped >= 0x00 && escaped < 0x20) {
          // leave 0x00...0x1f escaped
          out += '\\' + matched[0];
          continue;
        } else if (escaped === 0x22 || escaped === 0x27 || escaped === 0x5c) {
          // single-quote, apostrophe, backslash - escape these
          out += '\\' + String.fromCharCode(escaped);
        } else {
          out += String.fromCharCode(escaped);
        }
      }
    }

    return out;
  }

  // handle string
  //
  Tokenizer$1.prototype._read_string_recursive = function(delimiter, allow_unescaped_newlines, start_sub) {
    var current_char;
    var pattern;
    if (delimiter === '\'') {
      pattern = this.__patterns.single_quote;
    } else if (delimiter === '"') {
      pattern = this.__patterns.double_quote;
    } else if (delimiter === '`') {
      pattern = this.__patterns.template_text;
    } else if (delimiter === '}') {
      pattern = this.__patterns.template_expression;
    }

    var resulting_string = pattern.read();
    var next = '';
    while (this._input.hasNext()) {
      next = this._input.next();
      if (next === delimiter ||
        (!allow_unescaped_newlines && acorn.newline.test(next))) {
        this._input.back();
        break;
      } else if (next === '\\' && this._input.hasNext()) {
        current_char = this._input.peek();

        if (current_char === 'x' || current_char === 'u') {
          this.has_char_escapes = true;
        } else if (current_char === '\r' && this._input.peek(1) === '\n') {
          this._input.next();
        }
        next += this._input.next();
      } else if (start_sub) {
        if (start_sub === '${' && next === '$' && this._input.peek() === '{') {
          next += this._input.next();
        }

        if (start_sub === next) {
          if (delimiter === '`') {
            next += this._read_string_recursive('}', allow_unescaped_newlines, '`');
          } else {
            next += this._read_string_recursive('`', allow_unescaped_newlines, '${');
          }
          if (this._input.hasNext()) {
            next += this._input.next();
          }
        }
      }
      next += pattern.read();
      resulting_string += next;
    }

    return resulting_string;
  };

  var Tokenizer_1$1 = Tokenizer$1;
  var TOKEN_1$1 = TOKEN$1;
  var positionable_operators_1 = positionable_operators.slice();
  var line_starters_1 = line_starters.slice();

  var tokenizer$1 = {
  	Tokenizer: Tokenizer_1$1,
  	TOKEN: TOKEN_1$1,
  	positionable_operators: positionable_operators_1,
  	line_starters: line_starters_1
  };

  var Output$1 = output.Output;
  var Token$2 = token.Token;

  var Options$2 = options$1.Options;
  var Tokenizer$2 = tokenizer$1.Tokenizer;
  var line_starters$1 = tokenizer$1.line_starters;
  var positionable_operators$1 = tokenizer$1.positionable_operators;
  var TOKEN$2 = tokenizer$1.TOKEN;


  function in_array$1(what, arr) {
    return arr.indexOf(what) !== -1;
  }

  function ltrim(s) {
    return s.replace(/^\s+/g, '');
  }

  function generateMapFromStrings(list) {
    var result = {};
    for (var x = 0; x < list.length; x++) {
      // make the mapped names underscored instead of dash
      result[list[x].replace(/-/g, '_')] = list[x];
    }
    return result;
  }

  function reserved_word(token, word) {
    return token && token.type === TOKEN$2.RESERVED && token.text === word;
  }

  function reserved_array(token, words) {
    return token && token.type === TOKEN$2.RESERVED && in_array$1(token.text, words);
  }
  // Unsure of what they mean, but they work. Worth cleaning up in future.
  var special_words = ['case', 'return', 'do', 'if', 'throw', 'else', 'await', 'break', 'continue', 'async'];

  var validPositionValues$1 = ['before-newline', 'after-newline', 'preserve-newline'];

  // Generate map from array
  var OPERATOR_POSITION = generateMapFromStrings(validPositionValues$1);

  var OPERATOR_POSITION_BEFORE_OR_PRESERVE = [OPERATOR_POSITION.before_newline, OPERATOR_POSITION.preserve_newline];

  var MODE = {
    BlockStatement: 'BlockStatement', // 'BLOCK'
    Statement: 'Statement', // 'STATEMENT'
    ObjectLiteral: 'ObjectLiteral', // 'OBJECT',
    ArrayLiteral: 'ArrayLiteral', //'[EXPRESSION]',
    ForInitializer: 'ForInitializer', //'(FOR-EXPRESSION)',
    Conditional: 'Conditional', //'(COND-EXPRESSION)',
    Expression: 'Expression' //'(EXPRESSION)'
  };

  function remove_redundant_indentation(output, frame) {
    // This implementation is effective but has some issues:
    //     - can cause line wrap to happen too soon due to indent removal
    //           after wrap points are calculated
    // These issues are minor compared to ugly indentation.

    if (frame.multiline_frame ||
      frame.mode === MODE.ForInitializer ||
      frame.mode === MODE.Conditional) {
      return;
    }

    // remove one indent from each line inside this section
    output.remove_indent(frame.start_line_index);
  }

  // we could use just string.split, but
  // IE doesn't like returning empty strings
  function split_linebreaks(s) {
    //return s.split(/\x0d\x0a|\x0a/);

    s = s.replace(acorn.allLineBreaks, '\n');
    var out = [],
      idx = s.indexOf("\n");
    while (idx !== -1) {
      out.push(s.substring(0, idx));
      s = s.substring(idx + 1);
      idx = s.indexOf("\n");
    }
    if (s.length) {
      out.push(s);
    }
    return out;
  }

  function is_array(mode) {
    return mode === MODE.ArrayLiteral;
  }

  function is_expression(mode) {
    return in_array$1(mode, [MODE.Expression, MODE.ForInitializer, MODE.Conditional]);
  }

  function all_lines_start_with(lines, c) {
    for (var i = 0; i < lines.length; i++) {
      var line = lines[i].trim();
      if (line.charAt(0) !== c) {
        return false;
      }
    }
    return true;
  }

  function each_line_matches_indent(lines, indent) {
    var i = 0,
      len = lines.length,
      line;
    for (; i < len; i++) {
      line = lines[i];
      // allow empty lines to pass through
      if (line && line.indexOf(indent) !== 0) {
        return false;
      }
    }
    return true;
  }


  function Beautifier(source_text, options) {
    options = options || {};
    this._source_text = source_text || '';

    this._output = null;
    this._tokens = null;
    this._last_last_text = null;
    this._flags = null;
    this._previous_flags = null;

    this._flag_store = null;
    this._options = new Options$2(options);
  }

  Beautifier.prototype.create_flags = function(flags_base, mode) {
    var next_indent_level = 0;
    if (flags_base) {
      next_indent_level = flags_base.indentation_level;
      if (!this._output.just_added_newline() &&
        flags_base.line_indent_level > next_indent_level) {
        next_indent_level = flags_base.line_indent_level;
      }
    }

    var next_flags = {
      mode: mode,
      parent: flags_base,
      last_token: flags_base ? flags_base.last_token : new Token$2(TOKEN$2.START_BLOCK, ''), // last token text
      last_word: flags_base ? flags_base.last_word : '', // last TOKEN.WORD passed
      declaration_statement: false,
      declaration_assignment: false,
      multiline_frame: false,
      inline_frame: false,
      if_block: false,
      else_block: false,
      do_block: false,
      do_while: false,
      import_block: false,
      in_case_statement: false, // switch(..){ INSIDE HERE }
      in_case: false, // we're on the exact line with "case 0:"
      case_body: false, // the indented case-action block
      indentation_level: next_indent_level,
      alignment: 0,
      line_indent_level: flags_base ? flags_base.line_indent_level : next_indent_level,
      start_line_index: this._output.get_line_number(),
      ternary_depth: 0
    };
    return next_flags;
  };

  Beautifier.prototype._reset = function(source_text) {
    var baseIndentString = source_text.match(/^[\t ]*/)[0];

    this._last_last_text = ''; // pre-last token text
    this._output = new Output$1(this._options, baseIndentString);

    // If testing the ignore directive, start with output disable set to true
    this._output.raw = this._options.test_output_raw;


    // Stack of parsing/formatting states, including MODE.
    // We tokenize, parse, and output in an almost purely a forward-only stream of token input
    // and formatted output.  This makes the beautifier less accurate than full parsers
    // but also far more tolerant of syntax errors.
    //
    // For example, the default mode is MODE.BlockStatement. If we see a '{' we push a new frame of type
    // MODE.BlockStatement on the the stack, even though it could be object literal.  If we later
    // encounter a ":", we'll switch to to MODE.ObjectLiteral.  If we then see a ";",
    // most full parsers would die, but the beautifier gracefully falls back to
    // MODE.BlockStatement and continues on.
    this._flag_store = [];
    this.set_mode(MODE.BlockStatement);
    var tokenizer = new Tokenizer$2(source_text, this._options);
    this._tokens = tokenizer.tokenize();
    return source_text;
  };

  Beautifier.prototype.beautify = function() {
    // if disabled, return the input unchanged.
    if (this._options.disabled) {
      return this._source_text;
    }

    var sweet_code;
    var source_text = this._reset(this._source_text);

    var eol = this._options.eol;
    if (this._options.eol === 'auto') {
      eol = '\n';
      if (source_text && acorn.lineBreak.test(source_text || '')) {
        eol = source_text.match(acorn.lineBreak)[0];
      }
    }

    var current_token = this._tokens.next();
    while (current_token) {
      this.handle_token(current_token);

      this._last_last_text = this._flags.last_token.text;
      this._flags.last_token = current_token;

      current_token = this._tokens.next();
    }

    sweet_code = this._output.get_code(eol);

    return sweet_code;
  };

  Beautifier.prototype.handle_token = function(current_token, preserve_statement_flags) {
    if (current_token.type === TOKEN$2.START_EXPR) {
      this.handle_start_expr(current_token);
    } else if (current_token.type === TOKEN$2.END_EXPR) {
      this.handle_end_expr(current_token);
    } else if (current_token.type === TOKEN$2.START_BLOCK) {
      this.handle_start_block(current_token);
    } else if (current_token.type === TOKEN$2.END_BLOCK) {
      this.handle_end_block(current_token);
    } else if (current_token.type === TOKEN$2.WORD) {
      this.handle_word(current_token);
    } else if (current_token.type === TOKEN$2.RESERVED) {
      this.handle_word(current_token);
    } else if (current_token.type === TOKEN$2.SEMICOLON) {
      this.handle_semicolon(current_token);
    } else if (current_token.type === TOKEN$2.STRING) {
      this.handle_string(current_token);
    } else if (current_token.type === TOKEN$2.EQUALS) {
      this.handle_equals(current_token);
    } else if (current_token.type === TOKEN$2.OPERATOR) {
      this.handle_operator(current_token);
    } else if (current_token.type === TOKEN$2.COMMA) {
      this.handle_comma(current_token);
    } else if (current_token.type === TOKEN$2.BLOCK_COMMENT) {
      this.handle_block_comment(current_token, preserve_statement_flags);
    } else if (current_token.type === TOKEN$2.COMMENT) {
      this.handle_comment(current_token, preserve_statement_flags);
    } else if (current_token.type === TOKEN$2.DOT) {
      this.handle_dot(current_token);
    } else if (current_token.type === TOKEN$2.EOF) {
      this.handle_eof(current_token);
    } else if (current_token.type === TOKEN$2.UNKNOWN) {
      this.handle_unknown(current_token, preserve_statement_flags);
    } else {
      this.handle_unknown(current_token, preserve_statement_flags);
    }
  };

  Beautifier.prototype.handle_whitespace_and_comments = function(current_token, preserve_statement_flags) {
    var newlines = current_token.newlines;
    var keep_whitespace = this._options.keep_array_indentation && is_array(this._flags.mode);

    if (current_token.comments_before) {
      var comment_token = current_token.comments_before.next();
      while (comment_token) {
        // The cleanest handling of inline comments is to treat them as though they aren't there.
        // Just continue formatting and the behavior should be logical.
        // Also ignore unknown tokens.  Again, this should result in better behavior.
        this.handle_whitespace_and_comments(comment_token, preserve_statement_flags);
        this.handle_token(comment_token, preserve_statement_flags);
        comment_token = current_token.comments_before.next();
      }
    }

    if (keep_whitespace) {
      for (var i = 0; i < newlines; i += 1) {
        this.print_newline(i > 0, preserve_statement_flags);
      }
    } else {
      if (this._options.max_preserve_newlines && newlines > this._options.max_preserve_newlines) {
        newlines = this._options.max_preserve_newlines;
      }

      if (this._options.preserve_newlines) {
        if (newlines > 1) {
          this.print_newline(false, preserve_statement_flags);
          for (var j = 1; j < newlines; j += 1) {
            this.print_newline(true, preserve_statement_flags);
          }
        }
      }
    }

  };

  var newline_restricted_tokens = ['async', 'break', 'continue', 'return', 'throw', 'yield'];

  Beautifier.prototype.allow_wrap_or_preserved_newline = function(current_token, force_linewrap) {
    force_linewrap = (force_linewrap === undefined) ? false : force_linewrap;

    // Never wrap the first token on a line
    if (this._output.just_added_newline()) {
      return;
    }

    var shouldPreserveOrForce = (this._options.preserve_newlines && current_token.newlines) || force_linewrap;
    var operatorLogicApplies = in_array$1(this._flags.last_token.text, positionable_operators$1) ||
      in_array$1(current_token.text, positionable_operators$1);

    if (operatorLogicApplies) {
      var shouldPrintOperatorNewline = (
          in_array$1(this._flags.last_token.text, positionable_operators$1) &&
          in_array$1(this._options.operator_position, OPERATOR_POSITION_BEFORE_OR_PRESERVE)
        ) ||
        in_array$1(current_token.text, positionable_operators$1);
      shouldPreserveOrForce = shouldPreserveOrForce && shouldPrintOperatorNewline;
    }

    if (shouldPreserveOrForce) {
      this.print_newline(false, true);
    } else if (this._options.wrap_line_length) {
      if (reserved_array(this._flags.last_token, newline_restricted_tokens)) {
        // These tokens should never have a newline inserted
        // between them and the following expression.
        return;
      }
      this._output.set_wrap_point();
    }
  };

  Beautifier.prototype.print_newline = function(force_newline, preserve_statement_flags) {
    if (!preserve_statement_flags) {
      if (this._flags.last_token.text !== ';' && this._flags.last_token.text !== ',' && this._flags.last_token.text !== '=' && (this._flags.last_token.type !== TOKEN$2.OPERATOR || this._flags.last_token.text === '--' || this._flags.last_token.text === '++')) {
        var next_token = this._tokens.peek();
        while (this._flags.mode === MODE.Statement &&
          !(this._flags.if_block && reserved_word(next_token, 'else')) &&
          !this._flags.do_block) {
          this.restore_mode();
        }
      }
    }

    if (this._output.add_new_line(force_newline)) {
      this._flags.multiline_frame = true;
    }
  };

  Beautifier.prototype.print_token_line_indentation = function(current_token) {
    if (this._output.just_added_newline()) {
      if (this._options.keep_array_indentation &&
        current_token.newlines &&
        (current_token.text === '[' || is_array(this._flags.mode))) {
        this._output.current_line.set_indent(-1);
        this._output.current_line.push(current_token.whitespace_before);
        this._output.space_before_token = false;
      } else if (this._output.set_indent(this._flags.indentation_level, this._flags.alignment)) {
        this._flags.line_indent_level = this._flags.indentation_level;
      }
    }
  };

  Beautifier.prototype.print_token = function(current_token) {
    if (this._output.raw) {
      this._output.add_raw_token(current_token);
      return;
    }

    if (this._options.comma_first && current_token.previous && current_token.previous.type === TOKEN$2.COMMA &&
      this._output.just_added_newline()) {
      if (this._output.previous_line.last() === ',') {
        var popped = this._output.previous_line.pop();
        // if the comma was already at the start of the line,
        // pull back onto that line and reprint the indentation
        if (this._output.previous_line.is_empty()) {
          this._output.previous_line.push(popped);
          this._output.trim(true);
          this._output.current_line.pop();
          this._output.trim();
        }

        // add the comma in front of the next token
        this.print_token_line_indentation(current_token);
        this._output.add_token(',');
        this._output.space_before_token = true;
      }
    }

    this.print_token_line_indentation(current_token);
    this._output.non_breaking_space = true;
    this._output.add_token(current_token.text);
    if (this._output.previous_token_wrapped) {
      this._flags.multiline_frame = true;
    }
  };

  Beautifier.prototype.indent = function() {
    this._flags.indentation_level += 1;
    this._output.set_indent(this._flags.indentation_level, this._flags.alignment);
  };

  Beautifier.prototype.deindent = function() {
    if (this._flags.indentation_level > 0 &&
      ((!this._flags.parent) || this._flags.indentation_level > this._flags.parent.indentation_level)) {
      this._flags.indentation_level -= 1;
      this._output.set_indent(this._flags.indentation_level, this._flags.alignment);
    }
  };

  Beautifier.prototype.set_mode = function(mode) {
    if (this._flags) {
      this._flag_store.push(this._flags);
      this._previous_flags = this._flags;
    } else {
      this._previous_flags = this.create_flags(null, mode);
    }

    this._flags = this.create_flags(this._previous_flags, mode);
    this._output.set_indent(this._flags.indentation_level, this._flags.alignment);
  };


  Beautifier.prototype.restore_mode = function() {
    if (this._flag_store.length > 0) {
      this._previous_flags = this._flags;
      this._flags = this._flag_store.pop();
      if (this._previous_flags.mode === MODE.Statement) {
        remove_redundant_indentation(this._output, this._previous_flags);
      }
      this._output.set_indent(this._flags.indentation_level, this._flags.alignment);
    }
  };

  Beautifier.prototype.start_of_object_property = function() {
    return this._flags.parent.mode === MODE.ObjectLiteral && this._flags.mode === MODE.Statement && (
      (this._flags.last_token.text === ':' && this._flags.ternary_depth === 0) || (reserved_array(this._flags.last_token, ['get', 'set'])));
  };

  Beautifier.prototype.start_of_statement = function(current_token) {
    var start = false;
    start = start || reserved_array(this._flags.last_token, ['var', 'let', 'const']) && current_token.type === TOKEN$2.WORD;
    start = start || reserved_word(this._flags.last_token, 'do');
    start = start || (!(this._flags.parent.mode === MODE.ObjectLiteral && this._flags.mode === MODE.Statement)) && reserved_array(this._flags.last_token, newline_restricted_tokens) && !current_token.newlines;
    start = start || reserved_word(this._flags.last_token, 'else') &&
      !(reserved_word(current_token, 'if') && !current_token.comments_before);
    start = start || (this._flags.last_token.type === TOKEN$2.END_EXPR && (this._previous_flags.mode === MODE.ForInitializer || this._previous_flags.mode === MODE.Conditional));
    start = start || (this._flags.last_token.type === TOKEN$2.WORD && this._flags.mode === MODE.BlockStatement &&
      !this._flags.in_case &&
      !(current_token.text === '--' || current_token.text === '++') &&
      this._last_last_text !== 'function' &&
      current_token.type !== TOKEN$2.WORD && current_token.type !== TOKEN$2.RESERVED);
    start = start || (this._flags.mode === MODE.ObjectLiteral && (
      (this._flags.last_token.text === ':' && this._flags.ternary_depth === 0) || reserved_array(this._flags.last_token, ['get', 'set'])));

    if (start) {
      this.set_mode(MODE.Statement);
      this.indent();

      this.handle_whitespace_and_comments(current_token, true);

      // Issue #276:
      // If starting a new statement with [if, for, while, do], push to a new line.
      // if (a) if (b) if(c) d(); else e(); else f();
      if (!this.start_of_object_property()) {
        this.allow_wrap_or_preserved_newline(current_token,
          reserved_array(current_token, ['do', 'for', 'if', 'while']));
      }
      return true;
    }
    return false;
  };

  Beautifier.prototype.handle_start_expr = function(current_token) {
    // The conditional starts the statement if appropriate.
    if (!this.start_of_statement(current_token)) {
      this.handle_whitespace_and_comments(current_token);
    }

    var next_mode = MODE.Expression;
    if (current_token.text === '[') {

      if (this._flags.last_token.type === TOKEN$2.WORD || this._flags.last_token.text === ')') {
        // this is array index specifier, break immediately
        // a[x], fn()[x]
        if (reserved_array(this._flags.last_token, line_starters$1)) {
          this._output.space_before_token = true;
        }
        this.print_token(current_token);
        this.set_mode(next_mode);
        this.indent();
        if (this._options.space_in_paren) {
          this._output.space_before_token = true;
        }
        return;
      }

      next_mode = MODE.ArrayLiteral;
      if (is_array(this._flags.mode)) {
        if (this._flags.last_token.text === '[' ||
          (this._flags.last_token.text === ',' && (this._last_last_text === ']' || this._last_last_text === '}'))) {
          // ], [ goes to new line
          // }, [ goes to new line
          if (!this._options.keep_array_indentation) {
            this.print_newline();
          }
        }
      }

      if (!in_array$1(this._flags.last_token.type, [TOKEN$2.START_EXPR, TOKEN$2.END_EXPR, TOKEN$2.WORD, TOKEN$2.OPERATOR])) {
        this._output.space_before_token = true;
      }
    } else {
      if (this._flags.last_token.type === TOKEN$2.RESERVED) {
        if (this._flags.last_token.text === 'for') {
          this._output.space_before_token = this._options.space_before_conditional;
          next_mode = MODE.ForInitializer;
        } else if (in_array$1(this._flags.last_token.text, ['if', 'while'])) {
          this._output.space_before_token = this._options.space_before_conditional;
          next_mode = MODE.Conditional;
        } else if (in_array$1(this._flags.last_word, ['await', 'async'])) {
          // Should be a space between await and an IIFE, or async and an arrow function
          this._output.space_before_token = true;
        } else if (this._flags.last_token.text === 'import' && current_token.whitespace_before === '') {
          this._output.space_before_token = false;
        } else if (in_array$1(this._flags.last_token.text, line_starters$1) || this._flags.last_token.text === 'catch') {
          this._output.space_before_token = true;
        }
      } else if (this._flags.last_token.type === TOKEN$2.EQUALS || this._flags.last_token.type === TOKEN$2.OPERATOR) {
        // Support of this kind of newline preservation.
        // a = (b &&
        //     (c || d));
        if (!this.start_of_object_property()) {
          this.allow_wrap_or_preserved_newline(current_token);
        }
      } else if (this._flags.last_token.type === TOKEN$2.WORD) {
        this._output.space_before_token = false;

        // function name() vs function name ()
        // function* name() vs function* name ()
        // async name() vs async name ()
        // In ES6, you can also define the method properties of an object
        // var obj = {a: function() {}}
        // It can be abbreviated
        // var obj = {a() {}}
        // var obj = { a() {}} vs var obj = { a () {}}
        // var obj = { * a() {}} vs var obj = { * a () {}}
        var peek_back_two = this._tokens.peek(-3);
        if (this._options.space_after_named_function && peek_back_two) {
          // peek starts at next character so -1 is current token
          var peek_back_three = this._tokens.peek(-4);
          if (reserved_array(peek_back_two, ['async', 'function']) ||
            (peek_back_two.text === '*' && reserved_array(peek_back_three, ['async', 'function']))) {
            this._output.space_before_token = true;
          } else if (this._flags.mode === MODE.ObjectLiteral) {
            if ((peek_back_two.text === '{' || peek_back_two.text === ',') ||
              (peek_back_two.text === '*' && (peek_back_three.text === '{' || peek_back_three.text === ','))) {
              this._output.space_before_token = true;
            }
          }
        }
      } else {
        // Support preserving wrapped arrow function expressions
        // a.b('c',
        //     () => d.e
        // )
        this.allow_wrap_or_preserved_newline(current_token);
      }

      // function() vs function ()
      // yield*() vs yield* ()
      // function*() vs function* ()
      if ((this._flags.last_token.type === TOKEN$2.RESERVED && (this._flags.last_word === 'function' || this._flags.last_word === 'typeof')) ||
        (this._flags.last_token.text === '*' &&
          (in_array$1(this._last_last_text, ['function', 'yield']) ||
            (this._flags.mode === MODE.ObjectLiteral && in_array$1(this._last_last_text, ['{', ',']))))) {
        this._output.space_before_token = this._options.space_after_anon_function;
      }
    }

    if (this._flags.last_token.text === ';' || this._flags.last_token.type === TOKEN$2.START_BLOCK) {
      this.print_newline();
    } else if (this._flags.last_token.type === TOKEN$2.END_EXPR || this._flags.last_token.type === TOKEN$2.START_EXPR || this._flags.last_token.type === TOKEN$2.END_BLOCK || this._flags.last_token.text === '.' || this._flags.last_token.type === TOKEN$2.COMMA) {
      // do nothing on (( and )( and ][ and ]( and .(
      // TODO: Consider whether forcing this is required.  Review failing tests when removed.
      this.allow_wrap_or_preserved_newline(current_token, current_token.newlines);
    }

    this.print_token(current_token);
    this.set_mode(next_mode);
    if (this._options.space_in_paren) {
      this._output.space_before_token = true;
    }

    // In all cases, if we newline while inside an expression it should be indented.
    this.indent();
  };

  Beautifier.prototype.handle_end_expr = function(current_token) {
    // statements inside expressions are not valid syntax, but...
    // statements must all be closed when their container closes
    while (this._flags.mode === MODE.Statement) {
      this.restore_mode();
    }

    this.handle_whitespace_and_comments(current_token);

    if (this._flags.multiline_frame) {
      this.allow_wrap_or_preserved_newline(current_token,
        current_token.text === ']' && is_array(this._flags.mode) && !this._options.keep_array_indentation);
    }

    if (this._options.space_in_paren) {
      if (this._flags.last_token.type === TOKEN$2.START_EXPR && !this._options.space_in_empty_paren) {
        // () [] no inner space in empty parens like these, ever, ref #320
        this._output.trim();
        this._output.space_before_token = false;
      } else {
        this._output.space_before_token = true;
      }
    }
    this.deindent();
    this.print_token(current_token);
    this.restore_mode();

    remove_redundant_indentation(this._output, this._previous_flags);

    // do {} while () // no statement required after
    if (this._flags.do_while && this._previous_flags.mode === MODE.Conditional) {
      this._previous_flags.mode = MODE.Expression;
      this._flags.do_block = false;
      this._flags.do_while = false;

    }
  };

  Beautifier.prototype.handle_start_block = function(current_token) {
    this.handle_whitespace_and_comments(current_token);

    // Check if this is should be treated as a ObjectLiteral
    var next_token = this._tokens.peek();
    var second_token = this._tokens.peek(1);
    if (this._flags.last_word === 'switch' && this._flags.last_token.type === TOKEN$2.END_EXPR) {
      this.set_mode(MODE.BlockStatement);
      this._flags.in_case_statement = true;
    } else if (this._flags.case_body) {
      this.set_mode(MODE.BlockStatement);
    } else if (second_token && (
        (in_array$1(second_token.text, [':', ',']) && in_array$1(next_token.type, [TOKEN$2.STRING, TOKEN$2.WORD, TOKEN$2.RESERVED])) ||
        (in_array$1(next_token.text, ['get', 'set', '...']) && in_array$1(second_token.type, [TOKEN$2.WORD, TOKEN$2.RESERVED]))
      )) {
      // We don't support TypeScript,but we didn't break it for a very long time.
      // We'll try to keep not breaking it.
      if (!in_array$1(this._last_last_text, ['class', 'interface'])) {
        this.set_mode(MODE.ObjectLiteral);
      } else {
        this.set_mode(MODE.BlockStatement);
      }
    } else if (this._flags.last_token.type === TOKEN$2.OPERATOR && this._flags.last_token.text === '=>') {
      // arrow function: (param1, paramN) => { statements }
      this.set_mode(MODE.BlockStatement);
    } else if (in_array$1(this._flags.last_token.type, [TOKEN$2.EQUALS, TOKEN$2.START_EXPR, TOKEN$2.COMMA, TOKEN$2.OPERATOR]) ||
      reserved_array(this._flags.last_token, ['return', 'throw', 'import', 'default'])
    ) {
      // Detecting shorthand function syntax is difficult by scanning forward,
      //     so check the surrounding context.
      // If the block is being returned, imported, export default, passed as arg,
      //     assigned with = or assigned in a nested object, treat as an ObjectLiteral.
      this.set_mode(MODE.ObjectLiteral);
    } else {
      this.set_mode(MODE.BlockStatement);
    }

    var empty_braces = !next_token.comments_before && next_token.text === '}';
    var empty_anonymous_function = empty_braces && this._flags.last_word === 'function' &&
      this._flags.last_token.type === TOKEN$2.END_EXPR;

    if (this._options.brace_preserve_inline) // check for inline, set inline_frame if so
    {
      // search forward for a newline wanted inside this block
      var index = 0;
      var check_token = null;
      this._flags.inline_frame = true;
      do {
        index += 1;
        check_token = this._tokens.peek(index - 1);
        if (check_token.newlines) {
          this._flags.inline_frame = false;
          break;
        }
      } while (check_token.type !== TOKEN$2.EOF &&
        !(check_token.type === TOKEN$2.END_BLOCK && check_token.opened === current_token));
    }

    if ((this._options.brace_style === "expand" ||
        (this._options.brace_style === "none" && current_token.newlines)) &&
      !this._flags.inline_frame) {
      if (this._flags.last_token.type !== TOKEN$2.OPERATOR &&
        (empty_anonymous_function ||
          this._flags.last_token.type === TOKEN$2.EQUALS ||
          (reserved_array(this._flags.last_token, special_words) && this._flags.last_token.text !== 'else'))) {
        this._output.space_before_token = true;
      } else {
        this.print_newline(false, true);
      }
    } else { // collapse || inline_frame
      if (is_array(this._previous_flags.mode) && (this._flags.last_token.type === TOKEN$2.START_EXPR || this._flags.last_token.type === TOKEN$2.COMMA)) {
        if (this._flags.last_token.type === TOKEN$2.COMMA || this._options.space_in_paren) {
          this._output.space_before_token = true;
        }

        if (this._flags.last_token.type === TOKEN$2.COMMA || (this._flags.last_token.type === TOKEN$2.START_EXPR && this._flags.inline_frame)) {
          this.allow_wrap_or_preserved_newline(current_token);
          this._previous_flags.multiline_frame = this._previous_flags.multiline_frame || this._flags.multiline_frame;
          this._flags.multiline_frame = false;
        }
      }
      if (this._flags.last_token.type !== TOKEN$2.OPERATOR && this._flags.last_token.type !== TOKEN$2.START_EXPR) {
        if (this._flags.last_token.type === TOKEN$2.START_BLOCK && !this._flags.inline_frame) {
          this.print_newline();
        } else {
          this._output.space_before_token = true;
        }
      }
    }
    this.print_token(current_token);
    this.indent();

    // Except for specific cases, open braces are followed by a new line.
    if (!empty_braces && !(this._options.brace_preserve_inline && this._flags.inline_frame)) {
      this.print_newline();
    }
  };

  Beautifier.prototype.handle_end_block = function(current_token) {
    // statements must all be closed when their container closes
    this.handle_whitespace_and_comments(current_token);

    while (this._flags.mode === MODE.Statement) {
      this.restore_mode();
    }

    var empty_braces = this._flags.last_token.type === TOKEN$2.START_BLOCK;

    if (this._flags.inline_frame && !empty_braces) { // try inline_frame (only set if this._options.braces-preserve-inline) first
      this._output.space_before_token = true;
    } else if (this._options.brace_style === "expand") {
      if (!empty_braces) {
        this.print_newline();
      }
    } else {
      // skip {}
      if (!empty_braces) {
        if (is_array(this._flags.mode) && this._options.keep_array_indentation) {
          // we REALLY need a newline here, but newliner would skip that
          this._options.keep_array_indentation = false;
          this.print_newline();
          this._options.keep_array_indentation = true;

        } else {
          this.print_newline();
        }
      }
    }
    this.restore_mode();
    this.print_token(current_token);
  };

  Beautifier.prototype.handle_word = function(current_token) {
    if (current_token.type === TOKEN$2.RESERVED) {
      if (in_array$1(current_token.text, ['set', 'get']) && this._flags.mode !== MODE.ObjectLiteral) {
        current_token.type = TOKEN$2.WORD;
      } else if (current_token.text === 'import' && this._tokens.peek().text === '(') {
        current_token.type = TOKEN$2.WORD;
      } else if (in_array$1(current_token.text, ['as', 'from']) && !this._flags.import_block) {
        current_token.type = TOKEN$2.WORD;
      } else if (this._flags.mode === MODE.ObjectLiteral) {
        var next_token = this._tokens.peek();
        if (next_token.text === ':') {
          current_token.type = TOKEN$2.WORD;
        }
      }
    }

    if (this.start_of_statement(current_token)) {
      // The conditional starts the statement if appropriate.
      if (reserved_array(this._flags.last_token, ['var', 'let', 'const']) && current_token.type === TOKEN$2.WORD) {
        this._flags.declaration_statement = true;
      }
    } else if (current_token.newlines && !is_expression(this._flags.mode) &&
      (this._flags.last_token.type !== TOKEN$2.OPERATOR || (this._flags.last_token.text === '--' || this._flags.last_token.text === '++')) &&
      this._flags.last_token.type !== TOKEN$2.EQUALS &&
      (this._options.preserve_newlines || !reserved_array(this._flags.last_token, ['var', 'let', 'const', 'set', 'get']))) {
      this.handle_whitespace_and_comments(current_token);
      this.print_newline();
    } else {
      this.handle_whitespace_and_comments(current_token);
    }

    if (this._flags.do_block && !this._flags.do_while) {
      if (reserved_word(current_token, 'while')) {
        // do {} ## while ()
        this._output.space_before_token = true;
        this.print_token(current_token);
        this._output.space_before_token = true;
        this._flags.do_while = true;
        return;
      } else {
        // do {} should always have while as the next word.
        // if we don't see the expected while, recover
        this.print_newline();
        this._flags.do_block = false;
      }
    }

    // if may be followed by else, or not
    // Bare/inline ifs are tricky
    // Need to unwind the modes correctly: if (a) if (b) c(); else d(); else e();
    if (this._flags.if_block) {
      if (!this._flags.else_block && reserved_word(current_token, 'else')) {
        this._flags.else_block = true;
      } else {
        while (this._flags.mode === MODE.Statement) {
          this.restore_mode();
        }
        this._flags.if_block = false;
        this._flags.else_block = false;
      }
    }

    if (this._flags.in_case_statement && reserved_array(current_token, ['case', 'default'])) {
      this.print_newline();
      if (this._flags.last_token.type !== TOKEN$2.END_BLOCK && (this._flags.case_body || this._options.jslint_happy)) {
        // switch cases following one another
        this.deindent();
      }
      this._flags.case_body = false;

      this.print_token(current_token);
      this._flags.in_case = true;
      return;
    }

    if (this._flags.last_token.type === TOKEN$2.COMMA || this._flags.last_token.type === TOKEN$2.START_EXPR || this._flags.last_token.type === TOKEN$2.EQUALS || this._flags.last_token.type === TOKEN$2.OPERATOR) {
      if (!this.start_of_object_property()) {
        this.allow_wrap_or_preserved_newline(current_token);
      }
    }

    if (reserved_word(current_token, 'function')) {
      if (in_array$1(this._flags.last_token.text, ['}', ';']) ||
        (this._output.just_added_newline() && !(in_array$1(this._flags.last_token.text, ['(', '[', '{', ':', '=', ',']) || this._flags.last_token.type === TOKEN$2.OPERATOR))) {
        // make sure there is a nice clean space of at least one blank line
        // before a new function definition
        if (!this._output.just_added_blankline() && !current_token.comments_before) {
          this.print_newline();
          this.print_newline(true);
        }
      }
      if (this._flags.last_token.type === TOKEN$2.RESERVED || this._flags.last_token.type === TOKEN$2.WORD) {
        if (reserved_array(this._flags.last_token, ['get', 'set', 'new', 'export']) ||
          reserved_array(this._flags.last_token, newline_restricted_tokens)) {
          this._output.space_before_token = true;
        } else if (reserved_word(this._flags.last_token, 'default') && this._last_last_text === 'export') {
          this._output.space_before_token = true;
        } else if (this._flags.last_token.text === 'declare') {
          // accomodates Typescript declare function formatting
          this._output.space_before_token = true;
        } else {
          this.print_newline();
        }
      } else if (this._flags.last_token.type === TOKEN$2.OPERATOR || this._flags.last_token.text === '=') {
        // foo = function
        this._output.space_before_token = true;
      } else if (!this._flags.multiline_frame && (is_expression(this._flags.mode) || is_array(this._flags.mode))) ; else {
        this.print_newline();
      }

      this.print_token(current_token);
      this._flags.last_word = current_token.text;
      return;
    }

    var prefix = 'NONE';

    if (this._flags.last_token.type === TOKEN$2.END_BLOCK) {

      if (this._previous_flags.inline_frame) {
        prefix = 'SPACE';
      } else if (!reserved_array(current_token, ['else', 'catch', 'finally', 'from'])) {
        prefix = 'NEWLINE';
      } else {
        if (this._options.brace_style === "expand" ||
          this._options.brace_style === "end-expand" ||
          (this._options.brace_style === "none" && current_token.newlines)) {
          prefix = 'NEWLINE';
        } else {
          prefix = 'SPACE';
          this._output.space_before_token = true;
        }
      }
    } else if (this._flags.last_token.type === TOKEN$2.SEMICOLON && this._flags.mode === MODE.BlockStatement) {
      // TODO: Should this be for STATEMENT as well?
      prefix = 'NEWLINE';
    } else if (this._flags.last_token.type === TOKEN$2.SEMICOLON && is_expression(this._flags.mode)) {
      prefix = 'SPACE';
    } else if (this._flags.last_token.type === TOKEN$2.STRING) {
      prefix = 'NEWLINE';
    } else if (this._flags.last_token.type === TOKEN$2.RESERVED || this._flags.last_token.type === TOKEN$2.WORD ||
      (this._flags.last_token.text === '*' &&
        (in_array$1(this._last_last_text, ['function', 'yield']) ||
          (this._flags.mode === MODE.ObjectLiteral && in_array$1(this._last_last_text, ['{', ',']))))) {
      prefix = 'SPACE';
    } else if (this._flags.last_token.type === TOKEN$2.START_BLOCK) {
      if (this._flags.inline_frame) {
        prefix = 'SPACE';
      } else {
        prefix = 'NEWLINE';
      }
    } else if (this._flags.last_token.type === TOKEN$2.END_EXPR) {
      this._output.space_before_token = true;
      prefix = 'NEWLINE';
    }

    if (reserved_array(current_token, line_starters$1) && this._flags.last_token.text !== ')') {
      if (this._flags.inline_frame || this._flags.last_token.text === 'else' || this._flags.last_token.text === 'export') {
        prefix = 'SPACE';
      } else {
        prefix = 'NEWLINE';
      }

    }

    if (reserved_array(current_token, ['else', 'catch', 'finally'])) {
      if ((!(this._flags.last_token.type === TOKEN$2.END_BLOCK && this._previous_flags.mode === MODE.BlockStatement) ||
          this._options.brace_style === "expand" ||
          this._options.brace_style === "end-expand" ||
          (this._options.brace_style === "none" && current_token.newlines)) &&
        !this._flags.inline_frame) {
        this.print_newline();
      } else {
        this._output.trim(true);
        var line = this._output.current_line;
        // If we trimmed and there's something other than a close block before us
        // put a newline back in.  Handles '} // comment' scenario.
        if (line.last() !== '}') {
          this.print_newline();
        }
        this._output.space_before_token = true;
      }
    } else if (prefix === 'NEWLINE') {
      if (reserved_array(this._flags.last_token, special_words)) {
        // no newline between 'return nnn'
        this._output.space_before_token = true;
      } else if (this._flags.last_token.text === 'declare' && reserved_array(current_token, ['var', 'let', 'const'])) {
        // accomodates Typescript declare formatting
        this._output.space_before_token = true;
      } else if (this._flags.last_token.type !== TOKEN$2.END_EXPR) {
        if ((this._flags.last_token.type !== TOKEN$2.START_EXPR || !reserved_array(current_token, ['var', 'let', 'const'])) && this._flags.last_token.text !== ':') {
          // no need to force newline on 'var': for (var x = 0...)
          if (reserved_word(current_token, 'if') && reserved_word(current_token.previous, 'else')) {
            // no newline for } else if {
            this._output.space_before_token = true;
          } else {
            this.print_newline();
          }
        }
      } else if (reserved_array(current_token, line_starters$1) && this._flags.last_token.text !== ')') {
        this.print_newline();
      }
    } else if (this._flags.multiline_frame && is_array(this._flags.mode) && this._flags.last_token.text === ',' && this._last_last_text === '}') {
      this.print_newline(); // }, in lists get a newline treatment
    } else if (prefix === 'SPACE') {
      this._output.space_before_token = true;
    }
    if (current_token.previous && (current_token.previous.type === TOKEN$2.WORD || current_token.previous.type === TOKEN$2.RESERVED)) {
      this._output.space_before_token = true;
    }
    this.print_token(current_token);
    this._flags.last_word = current_token.text;

    if (current_token.type === TOKEN$2.RESERVED) {
      if (current_token.text === 'do') {
        this._flags.do_block = true;
      } else if (current_token.text === 'if') {
        this._flags.if_block = true;
      } else if (current_token.text === 'import') {
        this._flags.import_block = true;
      } else if (this._flags.import_block && reserved_word(current_token, 'from')) {
        this._flags.import_block = false;
      }
    }
  };

  Beautifier.prototype.handle_semicolon = function(current_token) {
    if (this.start_of_statement(current_token)) {
      // The conditional starts the statement if appropriate.
      // Semicolon can be the start (and end) of a statement
      this._output.space_before_token = false;
    } else {
      this.handle_whitespace_and_comments(current_token);
    }

    var next_token = this._tokens.peek();
    while (this._flags.mode === MODE.Statement &&
      !(this._flags.if_block && reserved_word(next_token, 'else')) &&
      !this._flags.do_block) {
      this.restore_mode();
    }

    // hacky but effective for the moment
    if (this._flags.import_block) {
      this._flags.import_block = false;
    }
    this.print_token(current_token);
  };

  Beautifier.prototype.handle_string = function(current_token) {
    if (this.start_of_statement(current_token)) {
      // The conditional starts the statement if appropriate.
      // One difference - strings want at least a space before
      this._output.space_before_token = true;
    } else {
      this.handle_whitespace_and_comments(current_token);
      if (this._flags.last_token.type === TOKEN$2.RESERVED || this._flags.last_token.type === TOKEN$2.WORD || this._flags.inline_frame) {
        this._output.space_before_token = true;
      } else if (this._flags.last_token.type === TOKEN$2.COMMA || this._flags.last_token.type === TOKEN$2.START_EXPR || this._flags.last_token.type === TOKEN$2.EQUALS || this._flags.last_token.type === TOKEN$2.OPERATOR) {
        if (!this.start_of_object_property()) {
          this.allow_wrap_or_preserved_newline(current_token);
        }
      } else {
        this.print_newline();
      }
    }
    this.print_token(current_token);
  };

  Beautifier.prototype.handle_equals = function(current_token) {
    if (this.start_of_statement(current_token)) ; else {
      this.handle_whitespace_and_comments(current_token);
    }

    if (this._flags.declaration_statement) {
      // just got an '=' in a var-line, different formatting/line-breaking, etc will now be done
      this._flags.declaration_assignment = true;
    }
    this._output.space_before_token = true;
    this.print_token(current_token);
    this._output.space_before_token = true;
  };

  Beautifier.prototype.handle_comma = function(current_token) {
    this.handle_whitespace_and_comments(current_token, true);

    this.print_token(current_token);
    this._output.space_before_token = true;
    if (this._flags.declaration_statement) {
      if (is_expression(this._flags.parent.mode)) {
        // do not break on comma, for(var a = 1, b = 2)
        this._flags.declaration_assignment = false;
      }

      if (this._flags.declaration_assignment) {
        this._flags.declaration_assignment = false;
        this.print_newline(false, true);
      } else if (this._options.comma_first) {
        // for comma-first, we want to allow a newline before the comma
        // to turn into a newline after the comma, which we will fixup later
        this.allow_wrap_or_preserved_newline(current_token);
      }
    } else if (this._flags.mode === MODE.ObjectLiteral ||
      (this._flags.mode === MODE.Statement && this._flags.parent.mode === MODE.ObjectLiteral)) {
      if (this._flags.mode === MODE.Statement) {
        this.restore_mode();
      }

      if (!this._flags.inline_frame) {
        this.print_newline();
      }
    } else if (this._options.comma_first) {
      // EXPR or DO_BLOCK
      // for comma-first, we want to allow a newline before the comma
      // to turn into a newline after the comma, which we will fixup later
      this.allow_wrap_or_preserved_newline(current_token);
    }
  };

  Beautifier.prototype.handle_operator = function(current_token) {
    var isGeneratorAsterisk = current_token.text === '*' &&
      (reserved_array(this._flags.last_token, ['function', 'yield']) ||
        (in_array$1(this._flags.last_token.type, [TOKEN$2.START_BLOCK, TOKEN$2.COMMA, TOKEN$2.END_BLOCK, TOKEN$2.SEMICOLON]))
      );
    var isUnary = in_array$1(current_token.text, ['-', '+']) && (
      in_array$1(this._flags.last_token.type, [TOKEN$2.START_BLOCK, TOKEN$2.START_EXPR, TOKEN$2.EQUALS, TOKEN$2.OPERATOR]) ||
      in_array$1(this._flags.last_token.text, line_starters$1) ||
      this._flags.last_token.text === ','
    );

    if (this.start_of_statement(current_token)) ; else {
      var preserve_statement_flags = !isGeneratorAsterisk;
      this.handle_whitespace_and_comments(current_token, preserve_statement_flags);
    }

    if (reserved_array(this._flags.last_token, special_words)) {
      // "return" had a special handling in TK_WORD. Now we need to return the favor
      this._output.space_before_token = true;
      this.print_token(current_token);
      return;
    }

    // hack for actionscript's import .*;
    if (current_token.text === '*' && this._flags.last_token.type === TOKEN$2.DOT) {
      this.print_token(current_token);
      return;
    }

    if (current_token.text === '::') {
      // no spaces around exotic namespacing syntax operator
      this.print_token(current_token);
      return;
    }

    // Allow line wrapping between operators when operator_position is
    //   set to before or preserve
    if (this._flags.last_token.type === TOKEN$2.OPERATOR && in_array$1(this._options.operator_position, OPERATOR_POSITION_BEFORE_OR_PRESERVE)) {
      this.allow_wrap_or_preserved_newline(current_token);
    }

    if (current_token.text === ':' && this._flags.in_case) {
      this.print_token(current_token);

      this._flags.in_case = false;
      this._flags.case_body = true;
      if (this._tokens.peek().type !== TOKEN$2.START_BLOCK) {
        this.indent();
        this.print_newline();
      } else {
        this._output.space_before_token = true;
      }
      return;
    }

    var space_before = true;
    var space_after = true;
    var in_ternary = false;
    if (current_token.text === ':') {
      if (this._flags.ternary_depth === 0) {
        // Colon is invalid javascript outside of ternary and object, but do our best to guess what was meant.
        space_before = false;
      } else {
        this._flags.ternary_depth -= 1;
        in_ternary = true;
      }
    } else if (current_token.text === '?') {
      this._flags.ternary_depth += 1;
    }

    // let's handle the operator_position option prior to any conflicting logic
    if (!isUnary && !isGeneratorAsterisk && this._options.preserve_newlines && in_array$1(current_token.text, positionable_operators$1)) {
      var isColon = current_token.text === ':';
      var isTernaryColon = (isColon && in_ternary);
      var isOtherColon = (isColon && !in_ternary);

      switch (this._options.operator_position) {
        case OPERATOR_POSITION.before_newline:
          // if the current token is : and it's not a ternary statement then we set space_before to false
          this._output.space_before_token = !isOtherColon;

          this.print_token(current_token);

          if (!isColon || isTernaryColon) {
            this.allow_wrap_or_preserved_newline(current_token);
          }

          this._output.space_before_token = true;
          return;

        case OPERATOR_POSITION.after_newline:
          // if the current token is anything but colon, or (via deduction) it's a colon and in a ternary statement,
          //   then print a newline.

          this._output.space_before_token = true;

          if (!isColon || isTernaryColon) {
            if (this._tokens.peek().newlines) {
              this.print_newline(false, true);
            } else {
              this.allow_wrap_or_preserved_newline(current_token);
            }
          } else {
            this._output.space_before_token = false;
          }

          this.print_token(current_token);

          this._output.space_before_token = true;
          return;

        case OPERATOR_POSITION.preserve_newline:
          if (!isOtherColon) {
            this.allow_wrap_or_preserved_newline(current_token);
          }

          // if we just added a newline, or the current token is : and it's not a ternary statement,
          //   then we set space_before to false
          space_before = !(this._output.just_added_newline() || isOtherColon);

          this._output.space_before_token = space_before;
          this.print_token(current_token);
          this._output.space_before_token = true;
          return;
      }
    }

    if (isGeneratorAsterisk) {
      this.allow_wrap_or_preserved_newline(current_token);
      space_before = false;
      var next_token = this._tokens.peek();
      space_after = next_token && in_array$1(next_token.type, [TOKEN$2.WORD, TOKEN$2.RESERVED]);
    } else if (current_token.text === '...') {
      this.allow_wrap_or_preserved_newline(current_token);
      space_before = this._flags.last_token.type === TOKEN$2.START_BLOCK;
      space_after = false;
    } else if (in_array$1(current_token.text, ['--', '++', '!', '~']) || isUnary) {
      // unary operators (and binary +/- pretending to be unary) special cases
      if (this._flags.last_token.type === TOKEN$2.COMMA || this._flags.last_token.type === TOKEN$2.START_EXPR) {
        this.allow_wrap_or_preserved_newline(current_token);
      }

      space_before = false;
      space_after = false;

      // http://www.ecma-international.org/ecma-262/5.1/#sec-7.9.1
      // if there is a newline between -- or ++ and anything else we should preserve it.
      if (current_token.newlines && (current_token.text === '--' || current_token.text === '++')) {
        this.print_newline(false, true);
      }

      if (this._flags.last_token.text === ';' && is_expression(this._flags.mode)) {
        // for (;; ++i)
        //        ^^^
        space_before = true;
      }

      if (this._flags.last_token.type === TOKEN$2.RESERVED) {
        space_before = true;
      } else if (this._flags.last_token.type === TOKEN$2.END_EXPR) {
        space_before = !(this._flags.last_token.text === ']' && (current_token.text === '--' || current_token.text === '++'));
      } else if (this._flags.last_token.type === TOKEN$2.OPERATOR) {
        // a++ + ++b;
        // a - -b
        space_before = in_array$1(current_token.text, ['--', '-', '++', '+']) && in_array$1(this._flags.last_token.text, ['--', '-', '++', '+']);
        // + and - are not unary when preceeded by -- or ++ operator
        // a-- + b
        // a * +b
        // a - -b
        if (in_array$1(current_token.text, ['+', '-']) && in_array$1(this._flags.last_token.text, ['--', '++'])) {
          space_after = true;
        }
      }


      if (((this._flags.mode === MODE.BlockStatement && !this._flags.inline_frame) || this._flags.mode === MODE.Statement) &&
        (this._flags.last_token.text === '{' || this._flags.last_token.text === ';')) {
        // { foo; --i }
        // foo(); --bar;
        this.print_newline();
      }
    }

    this._output.space_before_token = this._output.space_before_token || space_before;
    this.print_token(current_token);
    this._output.space_before_token = space_after;
  };

  Beautifier.prototype.handle_block_comment = function(current_token, preserve_statement_flags) {
    if (this._output.raw) {
      this._output.add_raw_token(current_token);
      if (current_token.directives && current_token.directives.preserve === 'end') {
        // If we're testing the raw output behavior, do not allow a directive to turn it off.
        this._output.raw = this._options.test_output_raw;
      }
      return;
    }

    if (current_token.directives) {
      this.print_newline(false, preserve_statement_flags);
      this.print_token(current_token);
      if (current_token.directives.preserve === 'start') {
        this._output.raw = true;
      }
      this.print_newline(false, true);
      return;
    }

    // inline block
    if (!acorn.newline.test(current_token.text) && !current_token.newlines) {
      this._output.space_before_token = true;
      this.print_token(current_token);
      this._output.space_before_token = true;
      return;
    } else {
      this.print_block_commment(current_token, preserve_statement_flags);
    }
  };

  Beautifier.prototype.print_block_commment = function(current_token, preserve_statement_flags) {
    var lines = split_linebreaks(current_token.text);
    var j; // iterator for this case
    var javadoc = false;
    var starless = false;
    var lastIndent = current_token.whitespace_before;
    var lastIndentLength = lastIndent.length;

    // block comment starts with a new line
    this.print_newline(false, preserve_statement_flags);

    // first line always indented
    this.print_token_line_indentation(current_token);
    this._output.add_token(lines[0]);
    this.print_newline(false, preserve_statement_flags);


    if (lines.length > 1) {
      lines = lines.slice(1);
      javadoc = all_lines_start_with(lines, '*');
      starless = each_line_matches_indent(lines, lastIndent);

      if (javadoc) {
        this._flags.alignment = 1;
      }

      for (j = 0; j < lines.length; j++) {
        if (javadoc) {
          // javadoc: reformat and re-indent
          this.print_token_line_indentation(current_token);
          this._output.add_token(ltrim(lines[j]));
        } else if (starless && lines[j]) {
          // starless: re-indent non-empty content, avoiding trim
          this.print_token_line_indentation(current_token);
          this._output.add_token(lines[j].substring(lastIndentLength));
        } else {
          // normal comments output raw
          this._output.current_line.set_indent(-1);
          this._output.add_token(lines[j]);
        }

        // for comments on their own line or  more than one line, make sure there's a new line after
        this.print_newline(false, preserve_statement_flags);
      }

      this._flags.alignment = 0;
    }
  };


  Beautifier.prototype.handle_comment = function(current_token, preserve_statement_flags) {
    if (current_token.newlines) {
      this.print_newline(false, preserve_statement_flags);
    } else {
      this._output.trim(true);
    }

    this._output.space_before_token = true;
    this.print_token(current_token);
    this.print_newline(false, preserve_statement_flags);
  };

  Beautifier.prototype.handle_dot = function(current_token) {
    if (this.start_of_statement(current_token)) ; else {
      this.handle_whitespace_and_comments(current_token, true);
    }

    if (reserved_array(this._flags.last_token, special_words)) {
      this._output.space_before_token = false;
    } else {
      // allow preserved newlines before dots in general
      // force newlines on dots after close paren when break_chained - for bar().baz()
      this.allow_wrap_or_preserved_newline(current_token,
        this._flags.last_token.text === ')' && this._options.break_chained_methods);
    }

    // Only unindent chained method dot if this dot starts a new line.
    // Otherwise the automatic extra indentation removal will handle the over indent
    if (this._options.unindent_chained_methods && this._output.just_added_newline()) {
      this.deindent();
    }

    this.print_token(current_token);
  };

  Beautifier.prototype.handle_unknown = function(current_token, preserve_statement_flags) {
    this.print_token(current_token);

    if (current_token.text[current_token.text.length - 1] === '\n') {
      this.print_newline(false, preserve_statement_flags);
    }
  };

  Beautifier.prototype.handle_eof = function(current_token) {
    // Unwind any open statements
    while (this._flags.mode === MODE.Statement) {
      this.restore_mode();
    }
    this.handle_whitespace_and_comments(current_token);
  };

  var Beautifier_1 = Beautifier;

  var beautifier = {
  	Beautifier: Beautifier_1
  };

  var Beautifier$1 = beautifier.Beautifier,
    Options$3 = options$1.Options;

  function js_beautify(js_source_text, options) {
    var beautifier = new Beautifier$1(js_source_text, options);
    return beautifier.beautify();
  }

  var javascript = js_beautify;
  var defaultOptions = function() {
    return new Options$3();
  };
  javascript.defaultOptions = defaultOptions;

  var BaseOptions$1 = options.Options;

  function Options$4(options) {
    BaseOptions$1.call(this, options, 'css');

    this.selector_separator_newline = this._get_boolean('selector_separator_newline', true);
    this.newline_between_rules = this._get_boolean('newline_between_rules', true);
    var space_around_selector_separator = this._get_boolean('space_around_selector_separator');
    this.space_around_combinator = this._get_boolean('space_around_combinator') || space_around_selector_separator;

  }
  Options$4.prototype = new BaseOptions$1();



  var Options_1$2 = Options$4;

  var options$2 = {
  	Options: Options_1$2
  };

  var Options$5 = options$2.Options;
  var Output$2 = output.Output;
  var InputScanner$3 = inputscanner.InputScanner;
  var Directives$2 = directives.Directives;

  var directives_core$1 = new Directives$2(/\/\*/, /\*\//);

  var lineBreak = /\r\n|[\r\n]/;
  var allLineBreaks = /\r\n|[\r\n]/g;

  // tokenizer
  var whitespaceChar = /\s/;
  var whitespacePattern = /(?:\s|\n)+/g;
  var block_comment_pattern = /\/\*(?:[\s\S]*?)((?:\*\/)|$)/g;
  var comment_pattern = /\/\/(?:[^\n\r\u2028\u2029]*)/g;

  function Beautifier$2(source_text, options) {
    this._source_text = source_text || '';
    // Allow the setting of language/file-type specific options
    // with inheritance of overall settings
    this._options = new Options$5(options);
    this._ch = null;
    this._input = null;

    // https://developer.mozilla.org/en-US/docs/Web/CSS/At-rule
    this.NESTED_AT_RULE = {
      "@page": true,
      "@font-face": true,
      "@keyframes": true,
      // also in CONDITIONAL_GROUP_RULE below
      "@media": true,
      "@supports": true,
      "@document": true
    };
    this.CONDITIONAL_GROUP_RULE = {
      "@media": true,
      "@supports": true,
      "@document": true
    };

  }

  Beautifier$2.prototype.eatString = function(endChars) {
    var result = '';
    this._ch = this._input.next();
    while (this._ch) {
      result += this._ch;
      if (this._ch === "\\") {
        result += this._input.next();
      } else if (endChars.indexOf(this._ch) !== -1 || this._ch === "\n") {
        break;
      }
      this._ch = this._input.next();
    }
    return result;
  };

  // Skips any white space in the source text from the current position.
  // When allowAtLeastOneNewLine is true, will output new lines for each
  // newline character found; if the user has preserve_newlines off, only
  // the first newline will be output
  Beautifier$2.prototype.eatWhitespace = function(allowAtLeastOneNewLine) {
    var result = whitespaceChar.test(this._input.peek());
    var isFirstNewLine = true;

    while (whitespaceChar.test(this._input.peek())) {
      this._ch = this._input.next();
      if (allowAtLeastOneNewLine && this._ch === '\n') {
        if (this._options.preserve_newlines || isFirstNewLine) {
          isFirstNewLine = false;
          this._output.add_new_line(true);
        }
      }
    }
    return result;
  };

  // Nested pseudo-class if we are insideRule
  // and the next special character found opens
  // a new block
  Beautifier$2.prototype.foundNestedPseudoClass = function() {
    var openParen = 0;
    var i = 1;
    var ch = this._input.peek(i);
    while (ch) {
      if (ch === "{") {
        return true;
      } else if (ch === '(') {
        // pseudoclasses can contain ()
        openParen += 1;
      } else if (ch === ')') {
        if (openParen === 0) {
          return false;
        }
        openParen -= 1;
      } else if (ch === ";" || ch === "}") {
        return false;
      }
      i++;
      ch = this._input.peek(i);
    }
    return false;
  };

  Beautifier$2.prototype.print_string = function(output_string) {
    this._output.set_indent(this._indentLevel);
    this._output.non_breaking_space = true;
    this._output.add_token(output_string);
  };

  Beautifier$2.prototype.preserveSingleSpace = function(isAfterSpace) {
    if (isAfterSpace) {
      this._output.space_before_token = true;
    }
  };

  Beautifier$2.prototype.indent = function() {
    this._indentLevel++;
  };

  Beautifier$2.prototype.outdent = function() {
    if (this._indentLevel > 0) {
      this._indentLevel--;
    }
  };

  /*_____________________--------------------_____________________*/

  Beautifier$2.prototype.beautify = function() {
    if (this._options.disabled) {
      return this._source_text;
    }

    var source_text = this._source_text;
    var eol = this._options.eol;
    if (eol === 'auto') {
      eol = '\n';
      if (source_text && lineBreak.test(source_text || '')) {
        eol = source_text.match(lineBreak)[0];
      }
    }


    // HACK: newline parsing inconsistent. This brute force normalizes the this._input.
    source_text = source_text.replace(allLineBreaks, '\n');

    // reset
    var baseIndentString = source_text.match(/^[\t ]*/)[0];

    this._output = new Output$2(this._options, baseIndentString);
    this._input = new InputScanner$3(source_text);
    this._indentLevel = 0;
    this._nestedLevel = 0;

    this._ch = null;
    var parenLevel = 0;

    var insideRule = false;
    // This is the value side of a property value pair (blue in the following ex)
    // label { content: blue }
    var insidePropertyValue = false;
    var enteringConditionalGroup = false;
    var insideAtExtend = false;
    var insideAtImport = false;
    var topCharacter = this._ch;
    var whitespace;
    var isAfterSpace;
    var previous_ch;

    while (true) {
      whitespace = this._input.read(whitespacePattern);
      isAfterSpace = whitespace !== '';
      previous_ch = topCharacter;
      this._ch = this._input.next();
      if (this._ch === '\\' && this._input.hasNext()) {
        this._ch += this._input.next();
      }
      topCharacter = this._ch;

      if (!this._ch) {
        break;
      } else if (this._ch === '/' && this._input.peek() === '*') {
        // /* css comment */
        // Always start block comments on a new line.
        // This handles scenarios where a block comment immediately
        // follows a property definition on the same line or where
        // minified code is being beautified.
        this._output.add_new_line();
        this._input.back();

        var comment = this._input.read(block_comment_pattern);

        // Handle ignore directive
        var directives = directives_core$1.get_directives(comment);
        if (directives && directives.ignore === 'start') {
          comment += directives_core$1.readIgnored(this._input);
        }

        this.print_string(comment);

        // Ensures any new lines following the comment are preserved
        this.eatWhitespace(true);

        // Block comments are followed by a new line so they don't
        // share a line with other properties
        this._output.add_new_line();
      } else if (this._ch === '/' && this._input.peek() === '/') {
        // // single line comment
        // Preserves the space before a comment
        // on the same line as a rule
        this._output.space_before_token = true;
        this._input.back();
        this.print_string(this._input.read(comment_pattern));

        // Ensures any new lines following the comment are preserved
        this.eatWhitespace(true);
      } else if (this._ch === '@') {
        this.preserveSingleSpace(isAfterSpace);

        // deal with less propery mixins @{...}
        if (this._input.peek() === '{') {
          this.print_string(this._ch + this.eatString('}'));
        } else {
          this.print_string(this._ch);

          // strip trailing space, if present, for hash property checks
          var variableOrRule = this._input.peekUntilAfter(/[: ,;{}()[\]\/='"]/g);

          if (variableOrRule.match(/[ :]$/)) {
            // we have a variable or pseudo-class, add it and insert one space before continuing
            variableOrRule = this.eatString(": ").replace(/\s$/, '');
            this.print_string(variableOrRule);
            this._output.space_before_token = true;
          }

          variableOrRule = variableOrRule.replace(/\s$/, '');

          if (variableOrRule === 'extend') {
            insideAtExtend = true;
          } else if (variableOrRule === 'import') {
            insideAtImport = true;
          }

          // might be a nesting at-rule
          if (variableOrRule in this.NESTED_AT_RULE) {
            this._nestedLevel += 1;
            if (variableOrRule in this.CONDITIONAL_GROUP_RULE) {
              enteringConditionalGroup = true;
            }
            // might be less variable
          } else if (!insideRule && parenLevel === 0 && variableOrRule.indexOf(':') !== -1) {
            insidePropertyValue = true;
            this.indent();
          }
        }
      } else if (this._ch === '#' && this._input.peek() === '{') {
        this.preserveSingleSpace(isAfterSpace);
        this.print_string(this._ch + this.eatString('}'));
      } else if (this._ch === '{') {
        if (insidePropertyValue) {
          insidePropertyValue = false;
          this.outdent();
        }
        this.indent();
        this._output.space_before_token = true;
        this.print_string(this._ch);

        // when entering conditional groups, only rulesets are allowed
        if (enteringConditionalGroup) {
          enteringConditionalGroup = false;
          insideRule = (this._indentLevel > this._nestedLevel);
        } else {
          // otherwise, declarations are also allowed
          insideRule = (this._indentLevel >= this._nestedLevel);
        }
        if (this._options.newline_between_rules && insideRule) {
          if (this._output.previous_line && this._output.previous_line.item(-1) !== '{') {
            this._output.ensure_empty_line_above('/', ',');
          }
        }
        this.eatWhitespace(true);
        this._output.add_new_line();
      } else if (this._ch === '}') {
        this.outdent();
        this._output.add_new_line();
        if (previous_ch === '{') {
          this._output.trim(true);
        }
        insideAtImport = false;
        insideAtExtend = false;
        if (insidePropertyValue) {
          this.outdent();
          insidePropertyValue = false;
        }
        this.print_string(this._ch);
        insideRule = false;
        if (this._nestedLevel) {
          this._nestedLevel--;
        }

        this.eatWhitespace(true);
        this._output.add_new_line();

        if (this._options.newline_between_rules && !this._output.just_added_blankline()) {
          if (this._input.peek() !== '}') {
            this._output.add_new_line(true);
          }
        }
      } else if (this._ch === ":") {
        if ((insideRule || enteringConditionalGroup) && !(this._input.lookBack("&") || this.foundNestedPseudoClass()) && !this._input.lookBack("(") && !insideAtExtend && parenLevel === 0) {
          // 'property: value' delimiter
          // which could be in a conditional group query
          this.print_string(':');
          if (!insidePropertyValue) {
            insidePropertyValue = true;
            this._output.space_before_token = true;
            this.eatWhitespace(true);
            this.indent();
          }
        } else {
          // sass/less parent reference don't use a space
          // sass nested pseudo-class don't use a space

          // preserve space before pseudoclasses/pseudoelements, as it means "in any child"
          if (this._input.lookBack(" ")) {
            this._output.space_before_token = true;
          }
          if (this._input.peek() === ":") {
            // pseudo-element
            this._ch = this._input.next();
            this.print_string("::");
          } else {
            // pseudo-class
            this.print_string(':');
          }
        }
      } else if (this._ch === '"' || this._ch === '\'') {
        this.preserveSingleSpace(isAfterSpace);
        this.print_string(this._ch + this.eatString(this._ch));
        this.eatWhitespace(true);
      } else if (this._ch === ';') {
        if (parenLevel === 0) {
          if (insidePropertyValue) {
            this.outdent();
            insidePropertyValue = false;
          }
          insideAtExtend = false;
          insideAtImport = false;
          this.print_string(this._ch);
          this.eatWhitespace(true);

          // This maintains single line comments on the same
          // line. Block comments are also affected, but
          // a new line is always output before one inside
          // that section
          if (this._input.peek() !== '/') {
            this._output.add_new_line();
          }
        } else {
          this.print_string(this._ch);
          this.eatWhitespace(true);
          this._output.space_before_token = true;
        }
      } else if (this._ch === '(') { // may be a url
        if (this._input.lookBack("url")) {
          this.print_string(this._ch);
          this.eatWhitespace();
          parenLevel++;
          this.indent();
          this._ch = this._input.next();
          if (this._ch === ')' || this._ch === '"' || this._ch === '\'') {
            this._input.back();
          } else if (this._ch) {
            this.print_string(this._ch + this.eatString(')'));
            if (parenLevel) {
              parenLevel--;
              this.outdent();
            }
          }
        } else {
          this.preserveSingleSpace(isAfterSpace);
          this.print_string(this._ch);
          this.eatWhitespace();
          parenLevel++;
          this.indent();
        }
      } else if (this._ch === ')') {
        if (parenLevel) {
          parenLevel--;
          this.outdent();
        }
        this.print_string(this._ch);
      } else if (this._ch === ',') {
        this.print_string(this._ch);
        this.eatWhitespace(true);
        if (this._options.selector_separator_newline && !insidePropertyValue && parenLevel === 0 && !insideAtImport) {
          this._output.add_new_line();
        } else {
          this._output.space_before_token = true;
        }
      } else if ((this._ch === '>' || this._ch === '+' || this._ch === '~') && !insidePropertyValue && parenLevel === 0) {
        //handle combinator spacing
        if (this._options.space_around_combinator) {
          this._output.space_before_token = true;
          this.print_string(this._ch);
          this._output.space_before_token = true;
        } else {
          this.print_string(this._ch);
          this.eatWhitespace();
          // squash extra whitespace
          if (this._ch && whitespaceChar.test(this._ch)) {
            this._ch = '';
          }
        }
      } else if (this._ch === ']') {
        this.print_string(this._ch);
      } else if (this._ch === '[') {
        this.preserveSingleSpace(isAfterSpace);
        this.print_string(this._ch);
      } else if (this._ch === '=') { // no whitespace before or after
        this.eatWhitespace();
        this.print_string('=');
        if (whitespaceChar.test(this._ch)) {
          this._ch = '';
        }
      } else if (this._ch === '!' && !this._input.lookBack("\\")) { // !important
        this.print_string(' ');
        this.print_string(this._ch);
      } else {
        this.preserveSingleSpace(isAfterSpace);
        this.print_string(this._ch);
      }
    }

    var sweetCode = this._output.get_code(eol);

    return sweetCode;
  };

  var Beautifier_1$1 = Beautifier$2;

  var beautifier$1 = {
  	Beautifier: Beautifier_1$1
  };

  var Beautifier$3 = beautifier$1.Beautifier,
    Options$6 = options$2.Options;

  function css_beautify(source_text, options) {
    var beautifier = new Beautifier$3(source_text, options);
    return beautifier.beautify();
  }

  var css = css_beautify;
  var defaultOptions$1 = function() {
    return new Options$6();
  };
  css.defaultOptions = defaultOptions$1;

  var BaseOptions$2 = options.Options;

  function Options$7(options) {
    BaseOptions$2.call(this, options, 'html');
    if (this.templating.length === 1 && this.templating[0] === 'auto') {
      this.templating = ['django', 'erb', 'handlebars', 'php'];
    }

    this.indent_inner_html = this._get_boolean('indent_inner_html');
    this.indent_body_inner_html = this._get_boolean('indent_body_inner_html', true);
    this.indent_head_inner_html = this._get_boolean('indent_head_inner_html', true);

    this.indent_handlebars = this._get_boolean('indent_handlebars', true);
    this.wrap_attributes = this._get_selection('wrap_attributes',
      ['auto', 'force', 'force-aligned', 'force-expand-multiline', 'aligned-multiple', 'preserve', 'preserve-aligned']);
    this.wrap_attributes_indent_size = this._get_number('wrap_attributes_indent_size', this.indent_size);
    this.extra_liners = this._get_array('extra_liners', ['head', 'body', '/html']);

    // Block vs inline elements
    // https://developer.mozilla.org/en-US/docs/Web/HTML/Block-level_elements
    // https://developer.mozilla.org/en-US/docs/Web/HTML/Inline_elements
    // https://www.w3.org/TR/html5/dom.html#phrasing-content
    this.inline = this._get_array('inline', [
      'a', 'abbr', 'area', 'audio', 'b', 'bdi', 'bdo', 'br', 'button', 'canvas', 'cite',
      'code', 'data', 'datalist', 'del', 'dfn', 'em', 'embed', 'i', 'iframe', 'img',
      'input', 'ins', 'kbd', 'keygen', 'label', 'map', 'mark', 'math', 'meter', 'noscript',
      'object', 'output', 'progress', 'q', 'ruby', 's', 'samp', /* 'script', */ 'select', 'small',
      'span', 'strong', 'sub', 'sup', 'svg', 'template', 'textarea', 'time', 'u', 'var',
      'video', 'wbr', 'text',
      // obsolete inline tags
      'acronym', 'big', 'strike', 'tt'
    ]);
    this.void_elements = this._get_array('void_elements', [
      // HTLM void elements - aka self-closing tags - aka singletons
      // https://www.w3.org/html/wg/drafts/html/master/syntax.html#void-elements
      'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen',
      'link', 'menuitem', 'meta', 'param', 'source', 'track', 'wbr',
      // NOTE: Optional tags are too complex for a simple list
      // they are hard coded in _do_optional_end_element

      // Doctype and xml elements
      '!doctype', '?xml',

      // obsolete tags
      // basefont: https://www.computerhope.com/jargon/h/html-basefont-tag.htm
      // isndex: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/isindex
      'basefont', 'isindex'
    ]);
    this.unformatted = this._get_array('unformatted', []);
    this.content_unformatted = this._get_array('content_unformatted', [
      'pre', 'textarea'
    ]);
    this.unformatted_content_delimiter = this._get_characters('unformatted_content_delimiter');
    this.indent_scripts = this._get_selection('indent_scripts', ['normal', 'keep', 'separate']);

  }
  Options$7.prototype = new BaseOptions$2();



  var Options_1$3 = Options$7;

  var options$3 = {
  	Options: Options_1$3
  };

  var BaseTokenizer$1 = tokenizer.Tokenizer;
  var BASETOKEN$1 = tokenizer.TOKEN;
  var Directives$3 = directives.Directives;
  var TemplatablePattern$2 = templatablepattern.TemplatablePattern;
  var Pattern$4 = pattern.Pattern;

  var TOKEN$3 = {
    TAG_OPEN: 'TK_TAG_OPEN',
    TAG_CLOSE: 'TK_TAG_CLOSE',
    ATTRIBUTE: 'TK_ATTRIBUTE',
    EQUALS: 'TK_EQUALS',
    VALUE: 'TK_VALUE',
    COMMENT: 'TK_COMMENT',
    TEXT: 'TK_TEXT',
    UNKNOWN: 'TK_UNKNOWN',
    START: BASETOKEN$1.START,
    RAW: BASETOKEN$1.RAW,
    EOF: BASETOKEN$1.EOF
  };

  var directives_core$2 = new Directives$3(/<\!--/, /-->/);

  var Tokenizer$3 = function(input_string, options) {
    BaseTokenizer$1.call(this, input_string, options);
    this._current_tag_name = '';

    // Words end at whitespace or when a tag starts
    // if we are indenting handlebars, they are considered tags
    var templatable_reader = new TemplatablePattern$2(this._input).read_options(this._options);
    var pattern_reader = new Pattern$4(this._input);

    this.__patterns = {
      word: templatable_reader.until(/[\n\r\t <]/),
      single_quote: templatable_reader.until_after(/'/),
      double_quote: templatable_reader.until_after(/"/),
      attribute: templatable_reader.until(/[\n\r\t =\/>]/),
      element_name: templatable_reader.until(/[\n\r\t >\/]/),

      handlebars_comment: pattern_reader.starting_with(/{{!--/).until_after(/--}}/),
      handlebars: pattern_reader.starting_with(/{{/).until_after(/}}/),
      handlebars_open: pattern_reader.until(/[\n\r\t }]/),
      handlebars_raw_close: pattern_reader.until(/}}/),
      comment: pattern_reader.starting_with(/<!--/).until_after(/-->/),
      cdata: pattern_reader.starting_with(/<!\[cdata\[/).until_after(/]]>/),
      // https://en.wikipedia.org/wiki/Conditional_comment
      conditional_comment: pattern_reader.starting_with(/<!\[/).until_after(/]>/),
      processing: pattern_reader.starting_with(/<\?/).until_after(/\?>/)
    };

    if (this._options.indent_handlebars) {
      this.__patterns.word = this.__patterns.word.exclude('handlebars');
    }

    this._unformatted_content_delimiter = null;

    if (this._options.unformatted_content_delimiter) {
      var literal_regexp = this._input.get_literal_regexp(this._options.unformatted_content_delimiter);
      this.__patterns.unformatted_content_delimiter =
        pattern_reader.matching(literal_regexp)
        .until_after(literal_regexp);
    }
  };
  Tokenizer$3.prototype = new BaseTokenizer$1();

  Tokenizer$3.prototype._is_comment = function(current_token) { // jshint unused:false
    return false; //current_token.type === TOKEN.COMMENT || current_token.type === TOKEN.UNKNOWN;
  };

  Tokenizer$3.prototype._is_opening = function(current_token) {
    return current_token.type === TOKEN$3.TAG_OPEN;
  };

  Tokenizer$3.prototype._is_closing = function(current_token, open_token) {
    return current_token.type === TOKEN$3.TAG_CLOSE &&
      (open_token && (
        ((current_token.text === '>' || current_token.text === '/>') && open_token.text[0] === '<') ||
        (current_token.text === '}}' && open_token.text[0] === '{' && open_token.text[1] === '{')));
  };

  Tokenizer$3.prototype._reset = function() {
    this._current_tag_name = '';
  };

  Tokenizer$3.prototype._get_next_token = function(previous_token, open_token) { // jshint unused:false
    var token = null;
    this._readWhitespace();
    var c = this._input.peek();

    if (c === null) {
      return this._create_token(TOKEN$3.EOF, '');
    }

    token = token || this._read_open_handlebars(c, open_token);
    token = token || this._read_attribute(c, previous_token, open_token);
    token = token || this._read_raw_content(c, previous_token, open_token);
    token = token || this._read_close(c, open_token);
    token = token || this._read_content_word(c);
    token = token || this._read_comment(c);
    token = token || this._read_open(c, open_token);
    token = token || this._create_token(TOKEN$3.UNKNOWN, this._input.next());

    return token;
  };

  Tokenizer$3.prototype._read_comment = function(c) { // jshint unused:false
    var token = null;
    var resulting_string = null;
    var directives = null;

    if (c === '<') {
      var peek1 = this._input.peek(1);
      //if we're in a comment, do something special
      // We treat all comments as literals, even more than preformatted tags
      // we just look for the appropriate close tag
      if (c === '<' && (peek1 === '!' || peek1 === '?')) {
        resulting_string = this.__patterns.comment.read();

        // only process directive on html comments
        if (resulting_string) {
          directives = directives_core$2.get_directives(resulting_string);
          if (directives && directives.ignore === 'start') {
            resulting_string += directives_core$2.readIgnored(this._input);
          }
        } else {
          resulting_string = this.__patterns.cdata.read();
          resulting_string = resulting_string || this.__patterns.conditional_comment.read();
          resulting_string = resulting_string || this.__patterns.processing.read();
        }
      }

      if (resulting_string) {
        token = this._create_token(TOKEN$3.COMMENT, resulting_string);
        token.directives = directives;
      }
    }

    return token;
  };

  Tokenizer$3.prototype._read_open = function(c, open_token) {
    var resulting_string = null;
    var token = null;
    if (!open_token) {
      if (c === '<') {

        resulting_string = this._input.next();
        if (this._input.peek() === '/') {
          resulting_string += this._input.next();
        }
        resulting_string += this.__patterns.element_name.read();
        token = this._create_token(TOKEN$3.TAG_OPEN, resulting_string);
      }
    }
    return token;
  };

  Tokenizer$3.prototype._read_open_handlebars = function(c, open_token) {
    var resulting_string = null;
    var token = null;
    if (!open_token) {
      if (this._options.indent_handlebars && c === '{' && this._input.peek(1) === '{') {
        if (this._input.peek(2) === '!') {
          resulting_string = this.__patterns.handlebars_comment.read();
          resulting_string = resulting_string || this.__patterns.handlebars.read();
          token = this._create_token(TOKEN$3.COMMENT, resulting_string);
        } else {
          resulting_string = this.__patterns.handlebars_open.read();
          token = this._create_token(TOKEN$3.TAG_OPEN, resulting_string);
        }
      }
    }
    return token;
  };


  Tokenizer$3.prototype._read_close = function(c, open_token) {
    var resulting_string = null;
    var token = null;
    if (open_token) {
      if (open_token.text[0] === '<' && (c === '>' || (c === '/' && this._input.peek(1) === '>'))) {
        resulting_string = this._input.next();
        if (c === '/') { //  for close tag "/>"
          resulting_string += this._input.next();
        }
        token = this._create_token(TOKEN$3.TAG_CLOSE, resulting_string);
      } else if (open_token.text[0] === '{' && c === '}' && this._input.peek(1) === '}') {
        this._input.next();
        this._input.next();
        token = this._create_token(TOKEN$3.TAG_CLOSE, '}}');
      }
    }

    return token;
  };

  Tokenizer$3.prototype._read_attribute = function(c, previous_token, open_token) {
    var token = null;
    var resulting_string = '';
    if (open_token && open_token.text[0] === '<') {

      if (c === '=') {
        token = this._create_token(TOKEN$3.EQUALS, this._input.next());
      } else if (c === '"' || c === "'") {
        var content = this._input.next();
        if (c === '"') {
          content += this.__patterns.double_quote.read();
        } else {
          content += this.__patterns.single_quote.read();
        }
        token = this._create_token(TOKEN$3.VALUE, content);
      } else {
        resulting_string = this.__patterns.attribute.read();

        if (resulting_string) {
          if (previous_token.type === TOKEN$3.EQUALS) {
            token = this._create_token(TOKEN$3.VALUE, resulting_string);
          } else {
            token = this._create_token(TOKEN$3.ATTRIBUTE, resulting_string);
          }
        }
      }
    }
    return token;
  };

  Tokenizer$3.prototype._is_content_unformatted = function(tag_name) {
    // void_elements have no content and so cannot have unformatted content
    // script and style tags should always be read as unformatted content
    // finally content_unformatted and unformatted element contents are unformatted
    return this._options.void_elements.indexOf(tag_name) === -1 &&
      (this._options.content_unformatted.indexOf(tag_name) !== -1 ||
        this._options.unformatted.indexOf(tag_name) !== -1);
  };


  Tokenizer$3.prototype._read_raw_content = function(c, previous_token, open_token) { // jshint unused:false
    var resulting_string = '';
    if (open_token && open_token.text[0] === '{') {
      resulting_string = this.__patterns.handlebars_raw_close.read();
    } else if (previous_token.type === TOKEN$3.TAG_CLOSE && (previous_token.opened.text[0] === '<')) {
      var tag_name = previous_token.opened.text.substr(1).toLowerCase();
      if (tag_name === 'script' || tag_name === 'style') {
        // Script and style tags are allowed to have comments wrapping their content
        // or just have regular content.
        var token = this._read_comment(c);
        if (token) {
          token.type = TOKEN$3.TEXT;
          return token;
        }
        resulting_string = this._input.readUntil(new RegExp('</' + tag_name + '[\\n\\r\\t ]*?>', 'ig'));
      } else if (this._is_content_unformatted(tag_name)) {
        resulting_string = this._input.readUntil(new RegExp('</' + tag_name + '[\\n\\r\\t ]*?>', 'ig'));
      }
    }

    if (resulting_string) {
      return this._create_token(TOKEN$3.TEXT, resulting_string);
    }

    return null;
  };

  Tokenizer$3.prototype._read_content_word = function(c) {
    var resulting_string = '';
    if (this._options.unformatted_content_delimiter) {
      if (c === this._options.unformatted_content_delimiter[0]) {
        resulting_string = this.__patterns.unformatted_content_delimiter.read();
      }
    }

    if (!resulting_string) {
      resulting_string = this.__patterns.word.read();
    }
    if (resulting_string) {
      return this._create_token(TOKEN$3.TEXT, resulting_string);
    }
  };

  var Tokenizer_1$2 = Tokenizer$3;
  var TOKEN_1$2 = TOKEN$3;

  var tokenizer$2 = {
  	Tokenizer: Tokenizer_1$2,
  	TOKEN: TOKEN_1$2
  };

  var Options$8 = options$3.Options;
  var Output$3 = output.Output;
  var Tokenizer$4 = tokenizer$2.Tokenizer;
  var TOKEN$4 = tokenizer$2.TOKEN;

  var lineBreak$1 = /\r\n|[\r\n]/;
  var allLineBreaks$1 = /\r\n|[\r\n]/g;

  var Printer = function(options, base_indent_string) { //handles input/output and some other printing functions

    this.indent_level = 0;
    this.alignment_size = 0;
    this.max_preserve_newlines = options.max_preserve_newlines;
    this.preserve_newlines = options.preserve_newlines;

    this._output = new Output$3(options, base_indent_string);

  };

  Printer.prototype.current_line_has_match = function(pattern) {
    return this._output.current_line.has_match(pattern);
  };

  Printer.prototype.set_space_before_token = function(value, non_breaking) {
    this._output.space_before_token = value;
    this._output.non_breaking_space = non_breaking;
  };

  Printer.prototype.set_wrap_point = function() {
    this._output.set_indent(this.indent_level, this.alignment_size);
    this._output.set_wrap_point();
  };


  Printer.prototype.add_raw_token = function(token) {
    this._output.add_raw_token(token);
  };

  Printer.prototype.print_preserved_newlines = function(raw_token) {
    var newlines = 0;
    if (raw_token.type !== TOKEN$4.TEXT && raw_token.previous.type !== TOKEN$4.TEXT) {
      newlines = raw_token.newlines ? 1 : 0;
    }

    if (this.preserve_newlines) {
      newlines = raw_token.newlines < this.max_preserve_newlines + 1 ? raw_token.newlines : this.max_preserve_newlines + 1;
    }
    for (var n = 0; n < newlines; n++) {
      this.print_newline(n > 0);
    }

    return newlines !== 0;
  };

  Printer.prototype.traverse_whitespace = function(raw_token) {
    if (raw_token.whitespace_before || raw_token.newlines) {
      if (!this.print_preserved_newlines(raw_token)) {
        this._output.space_before_token = true;
      }
      return true;
    }
    return false;
  };

  Printer.prototype.previous_token_wrapped = function() {
    return this._output.previous_token_wrapped;
  };

  Printer.prototype.print_newline = function(force) {
    this._output.add_new_line(force);
  };

  Printer.prototype.print_token = function(token) {
    if (token.text) {
      this._output.set_indent(this.indent_level, this.alignment_size);
      this._output.add_token(token.text);
    }
  };

  Printer.prototype.indent = function() {
    this.indent_level++;
  };

  Printer.prototype.get_full_indent = function(level) {
    level = this.indent_level + (level || 0);
    if (level < 1) {
      return '';
    }

    return this._output.get_indent_string(level);
  };

  var get_type_attribute = function(start_token) {
    var result = null;
    var raw_token = start_token.next;

    // Search attributes for a type attribute
    while (raw_token.type !== TOKEN$4.EOF && start_token.closed !== raw_token) {
      if (raw_token.type === TOKEN$4.ATTRIBUTE && raw_token.text === 'type') {
        if (raw_token.next && raw_token.next.type === TOKEN$4.EQUALS &&
          raw_token.next.next && raw_token.next.next.type === TOKEN$4.VALUE) {
          result = raw_token.next.next.text;
        }
        break;
      }
      raw_token = raw_token.next;
    }

    return result;
  };

  var get_custom_beautifier_name = function(tag_check, raw_token) {
    var typeAttribute = null;
    var result = null;

    if (!raw_token.closed) {
      return null;
    }

    if (tag_check === 'script') {
      typeAttribute = 'text/javascript';
    } else if (tag_check === 'style') {
      typeAttribute = 'text/css';
    }

    typeAttribute = get_type_attribute(raw_token) || typeAttribute;

    // For script and style tags that have a type attribute, only enable custom beautifiers for matching values
    // For those without a type attribute use default;
    if (typeAttribute.search('text/css') > -1) {
      result = 'css';
    } else if (typeAttribute.search(/(text|application|dojo)\/(x-)?(javascript|ecmascript|jscript|livescript|(ld\+)?json|method|aspect)/) > -1) {
      result = 'javascript';
    } else if (typeAttribute.search(/(text|application|dojo)\/(x-)?(html)/) > -1) {
      result = 'html';
    } else if (typeAttribute.search(/test\/null/) > -1) {
      // Test only mime-type for testing the beautifier when null is passed as beautifing function
      result = 'null';
    }

    return result;
  };

  function in_array$2(what, arr) {
    return arr.indexOf(what) !== -1;
  }

  function TagFrame(parent, parser_token, indent_level) {
    this.parent = parent || null;
    this.tag = parser_token ? parser_token.tag_name : '';
    this.indent_level = indent_level || 0;
    this.parser_token = parser_token || null;
  }

  function TagStack(printer) {
    this._printer = printer;
    this._current_frame = null;
  }

  TagStack.prototype.get_parser_token = function() {
    return this._current_frame ? this._current_frame.parser_token : null;
  };

  TagStack.prototype.record_tag = function(parser_token) { //function to record a tag and its parent in this.tags Object
    var new_frame = new TagFrame(this._current_frame, parser_token, this._printer.indent_level);
    this._current_frame = new_frame;
  };

  TagStack.prototype._try_pop_frame = function(frame) { //function to retrieve the opening tag to the corresponding closer
    var parser_token = null;

    if (frame) {
      parser_token = frame.parser_token;
      this._printer.indent_level = frame.indent_level;
      this._current_frame = frame.parent;
    }

    return parser_token;
  };

  TagStack.prototype._get_frame = function(tag_list, stop_list) { //function to retrieve the opening tag to the corresponding closer
    var frame = this._current_frame;

    while (frame) { //till we reach '' (the initial value);
      if (tag_list.indexOf(frame.tag) !== -1) { //if this is it use it
        break;
      } else if (stop_list && stop_list.indexOf(frame.tag) !== -1) {
        frame = null;
        break;
      }
      frame = frame.parent;
    }

    return frame;
  };

  TagStack.prototype.try_pop = function(tag, stop_list) { //function to retrieve the opening tag to the corresponding closer
    var frame = this._get_frame([tag], stop_list);
    return this._try_pop_frame(frame);
  };

  TagStack.prototype.indent_to_tag = function(tag_list) {
    var frame = this._get_frame(tag_list);
    if (frame) {
      this._printer.indent_level = frame.indent_level;
    }
  };

  function Beautifier$4(source_text, options, js_beautify, css_beautify) {
    //Wrapper function to invoke all the necessary constructors and deal with the output.
    this._source_text = source_text || '';
    options = options || {};
    this._js_beautify = js_beautify;
    this._css_beautify = css_beautify;
    this._tag_stack = null;

    // Allow the setting of language/file-type specific options
    // with inheritance of overall settings
    var optionHtml = new Options$8(options, 'html');

    this._options = optionHtml;

    this._is_wrap_attributes_force = this._options.wrap_attributes.substr(0, 'force'.length) === 'force';
    this._is_wrap_attributes_force_expand_multiline = (this._options.wrap_attributes === 'force-expand-multiline');
    this._is_wrap_attributes_force_aligned = (this._options.wrap_attributes === 'force-aligned');
    this._is_wrap_attributes_aligned_multiple = (this._options.wrap_attributes === 'aligned-multiple');
    this._is_wrap_attributes_preserve = this._options.wrap_attributes.substr(0, 'preserve'.length) === 'preserve';
    this._is_wrap_attributes_preserve_aligned = (this._options.wrap_attributes === 'preserve-aligned');
  }

  Beautifier$4.prototype.beautify = function() {

    // if disabled, return the input unchanged.
    if (this._options.disabled) {
      return this._source_text;
    }

    var source_text = this._source_text;
    var eol = this._options.eol;
    if (this._options.eol === 'auto') {
      eol = '\n';
      if (source_text && lineBreak$1.test(source_text)) {
        eol = source_text.match(lineBreak$1)[0];
      }
    }

    // HACK: newline parsing inconsistent. This brute force normalizes the input.
    source_text = source_text.replace(allLineBreaks$1, '\n');

    var baseIndentString = source_text.match(/^[\t ]*/)[0];

    var last_token = {
      text: '',
      type: ''
    };

    var last_tag_token = new TagOpenParserToken();

    var printer = new Printer(this._options, baseIndentString);
    var tokens = new Tokenizer$4(source_text, this._options).tokenize();

    this._tag_stack = new TagStack(printer);

    var parser_token = null;
    var raw_token = tokens.next();
    while (raw_token.type !== TOKEN$4.EOF) {

      if (raw_token.type === TOKEN$4.TAG_OPEN || raw_token.type === TOKEN$4.COMMENT) {
        parser_token = this._handle_tag_open(printer, raw_token, last_tag_token, last_token);
        last_tag_token = parser_token;
      } else if ((raw_token.type === TOKEN$4.ATTRIBUTE || raw_token.type === TOKEN$4.EQUALS || raw_token.type === TOKEN$4.VALUE) ||
        (raw_token.type === TOKEN$4.TEXT && !last_tag_token.tag_complete)) {
        parser_token = this._handle_inside_tag(printer, raw_token, last_tag_token, tokens);
      } else if (raw_token.type === TOKEN$4.TAG_CLOSE) {
        parser_token = this._handle_tag_close(printer, raw_token, last_tag_token);
      } else if (raw_token.type === TOKEN$4.TEXT) {
        parser_token = this._handle_text(printer, raw_token, last_tag_token);
      } else {
        // This should never happen, but if it does. Print the raw token
        printer.add_raw_token(raw_token);
      }

      last_token = parser_token;

      raw_token = tokens.next();
    }
    var sweet_code = printer._output.get_code(eol);

    return sweet_code;
  };

  Beautifier$4.prototype._handle_tag_close = function(printer, raw_token, last_tag_token) {
    var parser_token = {
      text: raw_token.text,
      type: raw_token.type
    };
    printer.alignment_size = 0;
    last_tag_token.tag_complete = true;

    printer.set_space_before_token(raw_token.newlines || raw_token.whitespace_before !== '', true);
    if (last_tag_token.is_unformatted) {
      printer.add_raw_token(raw_token);
    } else {
      if (last_tag_token.tag_start_char === '<') {
        printer.set_space_before_token(raw_token.text[0] === '/', true); // space before />, no space before >
        if (this._is_wrap_attributes_force_expand_multiline && last_tag_token.has_wrapped_attrs) {
          printer.print_newline(false);
        }
      }
      printer.print_token(raw_token);

    }

    if (last_tag_token.indent_content &&
      !(last_tag_token.is_unformatted || last_tag_token.is_content_unformatted)) {
      printer.indent();

      // only indent once per opened tag
      last_tag_token.indent_content = false;
    }

    if (!last_tag_token.is_inline_element &&
      !(last_tag_token.is_unformatted || last_tag_token.is_content_unformatted)) {
      printer.set_wrap_point();
    }

    return parser_token;
  };

  Beautifier$4.prototype._handle_inside_tag = function(printer, raw_token, last_tag_token, tokens) {
    var wrapped = last_tag_token.has_wrapped_attrs;
    var parser_token = {
      text: raw_token.text,
      type: raw_token.type
    };

    printer.set_space_before_token(raw_token.newlines || raw_token.whitespace_before !== '', true);
    if (last_tag_token.is_unformatted) {
      printer.add_raw_token(raw_token);
    } else if (last_tag_token.tag_start_char === '{' && raw_token.type === TOKEN$4.TEXT) {
      // For the insides of handlebars allow newlines or a single space between open and contents
      if (printer.print_preserved_newlines(raw_token)) {
        raw_token.newlines = 0;
        printer.add_raw_token(raw_token);
      } else {
        printer.print_token(raw_token);
      }
    } else {
      if (raw_token.type === TOKEN$4.ATTRIBUTE) {
        printer.set_space_before_token(true);
        last_tag_token.attr_count += 1;
      } else if (raw_token.type === TOKEN$4.EQUALS) { //no space before =
        printer.set_space_before_token(false);
      } else if (raw_token.type === TOKEN$4.VALUE && raw_token.previous.type === TOKEN$4.EQUALS) { //no space before value
        printer.set_space_before_token(false);
      }

      if (raw_token.type === TOKEN$4.ATTRIBUTE && last_tag_token.tag_start_char === '<') {
        if (this._is_wrap_attributes_preserve || this._is_wrap_attributes_preserve_aligned) {
          printer.traverse_whitespace(raw_token);
          wrapped = wrapped || raw_token.newlines !== 0;
        }


        if (this._is_wrap_attributes_force) {
          var force_attr_wrap = last_tag_token.attr_count > 1;
          if (this._is_wrap_attributes_force_expand_multiline && last_tag_token.attr_count === 1) {
            var is_only_attribute = true;
            var peek_index = 0;
            var peek_token;
            do {
              peek_token = tokens.peek(peek_index);
              if (peek_token.type === TOKEN$4.ATTRIBUTE) {
                is_only_attribute = false;
                break;
              }
              peek_index += 1;
            } while (peek_index < 4 && peek_token.type !== TOKEN$4.EOF && peek_token.type !== TOKEN$4.TAG_CLOSE);

            force_attr_wrap = !is_only_attribute;
          }

          if (force_attr_wrap) {
            printer.print_newline(false);
            wrapped = true;
          }
        }
      }
      printer.print_token(raw_token);
      wrapped = wrapped || printer.previous_token_wrapped();
      last_tag_token.has_wrapped_attrs = wrapped;
    }
    return parser_token;
  };

  Beautifier$4.prototype._handle_text = function(printer, raw_token, last_tag_token) {
    var parser_token = {
      text: raw_token.text,
      type: 'TK_CONTENT'
    };
    if (last_tag_token.custom_beautifier_name) { //check if we need to format javascript
      this._print_custom_beatifier_text(printer, raw_token, last_tag_token);
    } else if (last_tag_token.is_unformatted || last_tag_token.is_content_unformatted) {
      printer.add_raw_token(raw_token);
    } else {
      printer.traverse_whitespace(raw_token);
      printer.print_token(raw_token);
    }
    return parser_token;
  };

  Beautifier$4.prototype._print_custom_beatifier_text = function(printer, raw_token, last_tag_token) {
    var local = this;
    if (raw_token.text !== '') {

      var text = raw_token.text,
        _beautifier,
        script_indent_level = 1,
        pre = '',
        post = '';
      if (last_tag_token.custom_beautifier_name === 'javascript' && typeof this._js_beautify === 'function') {
        _beautifier = this._js_beautify;
      } else if (last_tag_token.custom_beautifier_name === 'css' && typeof this._css_beautify === 'function') {
        _beautifier = this._css_beautify;
      } else if (last_tag_token.custom_beautifier_name === 'html') {
        _beautifier = function(html_source, options) {
          var beautifier = new Beautifier$4(html_source, options, local._js_beautify, local._css_beautify);
          return beautifier.beautify();
        };
      }

      if (this._options.indent_scripts === "keep") {
        script_indent_level = 0;
      } else if (this._options.indent_scripts === "separate") {
        script_indent_level = -printer.indent_level;
      }

      var indentation = printer.get_full_indent(script_indent_level);

      // if there is at least one empty line at the end of this text, strip it
      // we'll be adding one back after the text but before the containing tag.
      text = text.replace(/\n[ \t]*$/, '');

      // Handle the case where content is wrapped in a comment or cdata.
      if (last_tag_token.custom_beautifier_name !== 'html' &&
        text[0] === '<' && text.match(/^(<!--|<!\[CDATA\[)/)) {
        var matched = /^(<!--[^\n]*|<!\[CDATA\[)(\n?)([ \t\n]*)([\s\S]*)(-->|]]>)$/.exec(text);

        // if we start to wrap but don't finish, print raw
        if (!matched) {
          printer.add_raw_token(raw_token);
          return;
        }

        pre = indentation + matched[1] + '\n';
        text = matched[4];
        if (matched[5]) {
          post = indentation + matched[5];
        }

        // if there is at least one empty line at the end of this text, strip it
        // we'll be adding one back after the text but before the containing tag.
        text = text.replace(/\n[ \t]*$/, '');

        if (matched[2] || matched[3].indexOf('\n') !== -1) {
          // if the first line of the non-comment text has spaces
          // use that as the basis for indenting in null case.
          matched = matched[3].match(/[ \t]+$/);
          if (matched) {
            raw_token.whitespace_before = matched[0];
          }
        }
      }

      if (text) {
        if (_beautifier) {

          // call the Beautifier if avaliable
          var Child_options = function() {
            this.eol = '\n';
          };
          Child_options.prototype = this._options.raw_options;
          var child_options = new Child_options();
          text = _beautifier(indentation + text, child_options);
        } else {
          // simply indent the string otherwise
          var white = raw_token.whitespace_before;
          if (white) {
            text = text.replace(new RegExp('\n(' + white + ')?', 'g'), '\n');
          }

          text = indentation + text.replace(/\n/g, '\n' + indentation);
        }
      }

      if (pre) {
        if (!text) {
          text = pre + post;
        } else {
          text = pre + text + '\n' + post;
        }
      }

      printer.print_newline(false);
      if (text) {
        raw_token.text = text;
        raw_token.whitespace_before = '';
        raw_token.newlines = 0;
        printer.add_raw_token(raw_token);
        printer.print_newline(true);
      }
    }
  };

  Beautifier$4.prototype._handle_tag_open = function(printer, raw_token, last_tag_token, last_token) {
    var parser_token = this._get_tag_open_token(raw_token);

    if ((last_tag_token.is_unformatted || last_tag_token.is_content_unformatted) &&
      raw_token.type === TOKEN$4.TAG_OPEN && raw_token.text.indexOf('</') === 0) {
      // End element tags for unformatted or content_unformatted elements
      // are printed raw to keep any newlines inside them exactly the same.
      printer.add_raw_token(raw_token);
    } else {
      printer.traverse_whitespace(raw_token);
      this._set_tag_position(printer, raw_token, parser_token, last_tag_token, last_token);
      if (!parser_token.is_inline_element) {
        printer.set_wrap_point();
      }
      printer.print_token(raw_token);
    }

    //indent attributes an auto, forced, aligned or forced-align line-wrap
    if (this._is_wrap_attributes_force_aligned || this._is_wrap_attributes_aligned_multiple || this._is_wrap_attributes_preserve_aligned) {
      parser_token.alignment_size = raw_token.text.length + 1;
    }

    if (!parser_token.tag_complete && !parser_token.is_unformatted) {
      printer.alignment_size = parser_token.alignment_size;
    }

    return parser_token;
  };

  var TagOpenParserToken = function(parent, raw_token) {
    this.parent = parent || null;
    this.text = '';
    this.type = 'TK_TAG_OPEN';
    this.tag_name = '';
    this.is_inline_element = false;
    this.is_unformatted = false;
    this.is_content_unformatted = false;
    this.is_empty_element = false;
    this.is_start_tag = false;
    this.is_end_tag = false;
    this.indent_content = false;
    this.multiline_content = false;
    this.custom_beautifier_name = null;
    this.start_tag_token = null;
    this.attr_count = 0;
    this.has_wrapped_attrs = false;
    this.alignment_size = 0;
    this.tag_complete = false;
    this.tag_start_char = '';
    this.tag_check = '';

    if (!raw_token) {
      this.tag_complete = true;
    } else {
      var tag_check_match;

      this.tag_start_char = raw_token.text[0];
      this.text = raw_token.text;

      if (this.tag_start_char === '<') {
        tag_check_match = raw_token.text.match(/^<([^\s>]*)/);
        this.tag_check = tag_check_match ? tag_check_match[1] : '';
      } else {
        tag_check_match = raw_token.text.match(/^{{[#\^]?([^\s}]+)/);
        this.tag_check = tag_check_match ? tag_check_match[1] : '';
      }
      this.tag_check = this.tag_check.toLowerCase();

      if (raw_token.type === TOKEN$4.COMMENT) {
        this.tag_complete = true;
      }

      this.is_start_tag = this.tag_check.charAt(0) !== '/';
      this.tag_name = !this.is_start_tag ? this.tag_check.substr(1) : this.tag_check;
      this.is_end_tag = !this.is_start_tag ||
        (raw_token.closed && raw_token.closed.text === '/>');

      // handlebars tags that don't start with # or ^ are single_tags, and so also start and end.
      this.is_end_tag = this.is_end_tag ||
        (this.tag_start_char === '{' && (this.text.length < 3 || (/[^#\^]/.test(this.text.charAt(2)))));
    }
  };

  Beautifier$4.prototype._get_tag_open_token = function(raw_token) { //function to get a full tag and parse its type
    var parser_token = new TagOpenParserToken(this._tag_stack.get_parser_token(), raw_token);

    parser_token.alignment_size = this._options.wrap_attributes_indent_size;

    parser_token.is_end_tag = parser_token.is_end_tag ||
      in_array$2(parser_token.tag_check, this._options.void_elements);

    parser_token.is_empty_element = parser_token.tag_complete ||
      (parser_token.is_start_tag && parser_token.is_end_tag);

    parser_token.is_unformatted = !parser_token.tag_complete && in_array$2(parser_token.tag_check, this._options.unformatted);
    parser_token.is_content_unformatted = !parser_token.is_empty_element && in_array$2(parser_token.tag_check, this._options.content_unformatted);
    parser_token.is_inline_element = in_array$2(parser_token.tag_name, this._options.inline) || parser_token.tag_start_char === '{';

    return parser_token;
  };

  Beautifier$4.prototype._set_tag_position = function(printer, raw_token, parser_token, last_tag_token, last_token) {

    if (!parser_token.is_empty_element) {
      if (parser_token.is_end_tag) { //this tag is a double tag so check for tag-ending
        parser_token.start_tag_token = this._tag_stack.try_pop(parser_token.tag_name); //remove it and all ancestors
      } else { // it's a start-tag
        // check if this tag is starting an element that has optional end element
        // and do an ending needed
        if (this._do_optional_end_element(parser_token)) {
          if (!parser_token.is_inline_element) {
            if (parser_token.parent) {
              parser_token.parent.multiline_content = true;
            }
            printer.print_newline(false);
          }

        }

        this._tag_stack.record_tag(parser_token); //push it on the tag stack

        if ((parser_token.tag_name === 'script' || parser_token.tag_name === 'style') &&
          !(parser_token.is_unformatted || parser_token.is_content_unformatted)) {
          parser_token.custom_beautifier_name = get_custom_beautifier_name(parser_token.tag_check, raw_token);
        }
      }
    }

    if (in_array$2(parser_token.tag_check, this._options.extra_liners)) { //check if this double needs an extra line
      printer.print_newline(false);
      if (!printer._output.just_added_blankline()) {
        printer.print_newline(true);
      }
    }

    if (parser_token.is_empty_element) { //if this tag name is a single tag type (either in the list or has a closing /)

      // if you hit an else case, reset the indent level if you are inside an:
      // 'if', 'unless', or 'each' block.
      if (parser_token.tag_start_char === '{' && parser_token.tag_check === 'else') {
        this._tag_stack.indent_to_tag(['if', 'unless', 'each']);
        parser_token.indent_content = true;
        // Don't add a newline if opening {{#if}} tag is on the current line
        var foundIfOnCurrentLine = printer.current_line_has_match(/{{#if/);
        if (!foundIfOnCurrentLine) {
          printer.print_newline(false);
        }
      }

      // Don't add a newline before elements that should remain where they are.
      if (parser_token.tag_name === '!--' && last_token.type === TOKEN$4.TAG_CLOSE &&
        last_tag_token.is_end_tag && parser_token.text.indexOf('\n') === -1) ; else if (!parser_token.is_inline_element && !parser_token.is_unformatted) {
        printer.print_newline(false);
      }
    } else if (parser_token.is_unformatted || parser_token.is_content_unformatted) {
      if (!parser_token.is_inline_element && !parser_token.is_unformatted) {
        printer.print_newline(false);
      }
    } else if (parser_token.is_end_tag) { //this tag is a double tag so check for tag-ending
      if ((parser_token.start_tag_token && parser_token.start_tag_token.multiline_content) ||
        !(parser_token.is_inline_element ||
          (last_tag_token.is_inline_element) ||
          (last_token.type === TOKEN$4.TAG_CLOSE &&
            parser_token.start_tag_token === last_tag_token) ||
          (last_token.type === 'TK_CONTENT')
        )) {
        printer.print_newline(false);
      }
    } else { // it's a start-tag
      parser_token.indent_content = !parser_token.custom_beautifier_name;

      if (parser_token.tag_start_char === '<') {
        if (parser_token.tag_name === 'html') {
          parser_token.indent_content = this._options.indent_inner_html;
        } else if (parser_token.tag_name === 'head') {
          parser_token.indent_content = this._options.indent_head_inner_html;
        } else if (parser_token.tag_name === 'body') {
          parser_token.indent_content = this._options.indent_body_inner_html;
        }
      }

      if (!parser_token.is_inline_element && last_token.type !== 'TK_CONTENT') {
        if (parser_token.parent) {
          parser_token.parent.multiline_content = true;
        }
        printer.print_newline(false);
      }
    }
  };

  //To be used for <p> tag special case:
  //var p_closers = ['address', 'article', 'aside', 'blockquote', 'details', 'div', 'dl', 'fieldset', 'figcaption', 'figure', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'hr', 'main', 'nav', 'ol', 'p', 'pre', 'section', 'table', 'ul'];

  Beautifier$4.prototype._do_optional_end_element = function(parser_token) {
    var result = null;
    // NOTE: cases of "if there is no more content in the parent element"
    // are handled automatically by the beautifier.
    // It assumes parent or ancestor close tag closes all children.
    // https://www.w3.org/TR/html5/syntax.html#optional-tags
    if (parser_token.is_empty_element || !parser_token.is_start_tag || !parser_token.parent) {
      return;

    } else if (parser_token.tag_name === 'body') {
      // A head element’s end tag may be omitted if the head element is not immediately followed by a space character or a comment.
      result = result || this._tag_stack.try_pop('head');

      //} else if (parser_token.tag_name === 'body') {
      // DONE: A body element’s end tag may be omitted if the body element is not immediately followed by a comment.

    } else if (parser_token.tag_name === 'li') {
      // An li element’s end tag may be omitted if the li element is immediately followed by another li element or if there is no more content in the parent element.
      result = result || this._tag_stack.try_pop('li', ['ol', 'ul']);

    } else if (parser_token.tag_name === 'dd' || parser_token.tag_name === 'dt') {
      // A dd element’s end tag may be omitted if the dd element is immediately followed by another dd element or a dt element, or if there is no more content in the parent element.
      // A dt element’s end tag may be omitted if the dt element is immediately followed by another dt element or a dd element.
      result = result || this._tag_stack.try_pop('dt', ['dl']);
      result = result || this._tag_stack.try_pop('dd', ['dl']);

      //} else if (p_closers.indexOf(parser_token.tag_name) !== -1) {
      //TODO: THIS IS A BUG FARM. We are not putting this into 1.8.0 as it is likely to blow up.
      //A p element’s end tag may be omitted if the p element is immediately followed by an address, article, aside, blockquote, details, div, dl, fieldset, figcaption, figure, footer, form, h1, h2, h3, h4, h5, h6, header, hr, main, nav, ol, p, pre, section, table, or ul element, or if there is no more content in the parent element and the parent element is an HTML element that is not an a, audio, del, ins, map, noscript, or video element, or an autonomous custom element.
      //result = result || this._tag_stack.try_pop('p', ['body']);

    } else if (parser_token.tag_name === 'rp' || parser_token.tag_name === 'rt') {
      // An rt element’s end tag may be omitted if the rt element is immediately followed by an rt or rp element, or if there is no more content in the parent element.
      // An rp element’s end tag may be omitted if the rp element is immediately followed by an rt or rp element, or if there is no more content in the parent element.
      result = result || this._tag_stack.try_pop('rt', ['ruby', 'rtc']);
      result = result || this._tag_stack.try_pop('rp', ['ruby', 'rtc']);

    } else if (parser_token.tag_name === 'optgroup') {
      // An optgroup element’s end tag may be omitted if the optgroup element is immediately followed by another optgroup element, or if there is no more content in the parent element.
      // An option element’s end tag may be omitted if the option element is immediately followed by another option element, or if it is immediately followed by an optgroup element, or if there is no more content in the parent element.
      result = result || this._tag_stack.try_pop('optgroup', ['select']);
      //result = result || this._tag_stack.try_pop('option', ['select']);

    } else if (parser_token.tag_name === 'option') {
      // An option element’s end tag may be omitted if the option element is immediately followed by another option element, or if it is immediately followed by an optgroup element, or if there is no more content in the parent element.
      result = result || this._tag_stack.try_pop('option', ['select', 'datalist', 'optgroup']);

    } else if (parser_token.tag_name === 'colgroup') {
      // DONE: A colgroup element’s end tag may be omitted if the colgroup element is not immediately followed by a space character or a comment.
      // A caption element's end tag may be ommitted if a colgroup, thead, tfoot, tbody, or tr element is started.
      result = result || this._tag_stack.try_pop('caption', ['table']);

    } else if (parser_token.tag_name === 'thead') {
      // A colgroup element's end tag may be ommitted if a thead, tfoot, tbody, or tr element is started.
      // A caption element's end tag may be ommitted if a colgroup, thead, tfoot, tbody, or tr element is started.
      result = result || this._tag_stack.try_pop('caption', ['table']);
      result = result || this._tag_stack.try_pop('colgroup', ['table']);

      //} else if (parser_token.tag_name === 'caption') {
      // DONE: A caption element’s end tag may be omitted if the caption element is not immediately followed by a space character or a comment.

    } else if (parser_token.tag_name === 'tbody' || parser_token.tag_name === 'tfoot') {
      // A thead element’s end tag may be omitted if the thead element is immediately followed by a tbody or tfoot element.
      // A tbody element’s end tag may be omitted if the tbody element is immediately followed by a tbody or tfoot element, or if there is no more content in the parent element.
      // A colgroup element's end tag may be ommitted if a thead, tfoot, tbody, or tr element is started.
      // A caption element's end tag may be ommitted if a colgroup, thead, tfoot, tbody, or tr element is started.
      result = result || this._tag_stack.try_pop('caption', ['table']);
      result = result || this._tag_stack.try_pop('colgroup', ['table']);
      result = result || this._tag_stack.try_pop('thead', ['table']);
      result = result || this._tag_stack.try_pop('tbody', ['table']);

      //} else if (parser_token.tag_name === 'tfoot') {
      // DONE: A tfoot element’s end tag may be omitted if there is no more content in the parent element.

    } else if (parser_token.tag_name === 'tr') {
      // A tr element’s end tag may be omitted if the tr element is immediately followed by another tr element, or if there is no more content in the parent element.
      // A colgroup element's end tag may be ommitted if a thead, tfoot, tbody, or tr element is started.
      // A caption element's end tag may be ommitted if a colgroup, thead, tfoot, tbody, or tr element is started.
      result = result || this._tag_stack.try_pop('caption', ['table']);
      result = result || this._tag_stack.try_pop('colgroup', ['table']);
      result = result || this._tag_stack.try_pop('tr', ['table', 'thead', 'tbody', 'tfoot']);

    } else if (parser_token.tag_name === 'th' || parser_token.tag_name === 'td') {
      // A td element’s end tag may be omitted if the td element is immediately followed by a td or th element, or if there is no more content in the parent element.
      // A th element’s end tag may be omitted if the th element is immediately followed by a td or th element, or if there is no more content in the parent element.
      result = result || this._tag_stack.try_pop('td', ['table', 'thead', 'tbody', 'tfoot', 'tr']);
      result = result || this._tag_stack.try_pop('th', ['table', 'thead', 'tbody', 'tfoot', 'tr']);
    }

    // Start element omission not handled currently
    // A head element’s start tag may be omitted if the element is empty, or if the first thing inside the head element is an element.
    // A tbody element’s start tag may be omitted if the first thing inside the tbody element is a tr element, and if the element is not immediately preceded by a tbody, thead, or tfoot element whose end tag has been omitted. (It can’t be omitted if the element is empty.)
    // A colgroup element’s start tag may be omitted if the first thing inside the colgroup element is a col element, and if the element is not immediately preceded by another colgroup element whose end tag has been omitted. (It can’t be omitted if the element is empty.)

    // Fix up the parent of the parser token
    parser_token.parent = this._tag_stack.get_parser_token();

    return result;
  };

  var Beautifier_1$2 = Beautifier$4;

  var beautifier$2 = {
  	Beautifier: Beautifier_1$2
  };

  var Beautifier$5 = beautifier$2.Beautifier,
    Options$9 = options$3.Options;

  function style_html(html_source, options, js_beautify, css_beautify) {
    var beautifier = new Beautifier$5(html_source, options, js_beautify, css_beautify);
    return beautifier.beautify();
  }

  var html = style_html;
  var defaultOptions$2 = function() {
    return new Options$9();
  };
  html.defaultOptions = defaultOptions$2;

  function style_html$1(html_source, options, js, css$1) {
    js = js || javascript;
    css$1 = css$1 || css;
    return html(html_source, options, js, css$1);
  }
  style_html$1.defaultOptions = html.defaultOptions;

  var js = javascript;
  var css$1 = css;
  var html$1 = style_html$1;

  var src = {
  	js: js,
  	css: css$1,
  	html: html$1
  };

  var js$1 = createCommonjsModule(function (module) {

  /**
  The following batches are equivalent:

  var beautify_js = require('js-beautify');
  var beautify_js = require('js-beautify').js;
  var beautify_js = require('js-beautify').js_beautify;

  var beautify_css = require('js-beautify').css;
  var beautify_css = require('js-beautify').css_beautify;

  var beautify_html = require('js-beautify').html;
  var beautify_html = require('js-beautify').html_beautify;

  All methods returned accept two arguments, the source string and an options object.
  **/

  function get_beautify(js_beautify, css_beautify, html_beautify) {
    // the default is js
    var beautify = function(src, config) {
      return js_beautify.js_beautify(src, config);
    };

    // short aliases
    beautify.js = js_beautify.js_beautify;
    beautify.css = css_beautify.css_beautify;
    beautify.html = html_beautify.html_beautify;

    // legacy aliases
    beautify.js_beautify = js_beautify.js_beautify;
    beautify.css_beautify = css_beautify.css_beautify;
    beautify.html_beautify = html_beautify.html_beautify;

    return beautify;
  }

  {
    (function(mod) {
      var beautifier = src;
      beautifier.js_beautify = beautifier.js;
      beautifier.css_beautify = beautifier.css;
      beautifier.html_beautify = beautifier.html;

      mod.exports = get_beautify(beautifier, beautifier, beautifier);

    })(module);
  }
  });

  /*!
   * is-whitespace <https://github.com/jonschlinkert/is-whitespace>
   *
   * Copyright (c) 2014-2015, Jon Schlinkert.
   * Licensed under the MIT License.
   */

  var cache;

  var isWhitespace = function isWhitespace(str) {
    return (typeof str === 'string') && regex().test(str);
  };

  function regex() {
    // ensure that runtime compilation only happens once
    return cache || (cache = new RegExp('^[\\s\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF"]+$'));
  }

  /*!
   * is-extendable <https://github.com/jonschlinkert/is-extendable>
   *
   * Copyright (c) 2015, Jon Schlinkert.
   * Licensed under the MIT License.
   */

  var isExtendable = function isExtendable(val) {
    return typeof val !== 'undefined' && val !== null
      && (typeof val === 'object' || typeof val === 'function');
  };

  var extendShallow = function extend(o/*, objects*/) {
    var arguments$1 = arguments;

    if (!isExtendable(o)) { o = {}; }

    var len = arguments.length;
    for (var i = 1; i < len; i++) {
      var obj = arguments$1[i];

      if (isExtendable(obj)) {
        assign(o, obj);
      }
    }
    return o;
  };

  function assign(a, b) {
    for (var key in b) {
      if (hasOwn(b, key)) {
        a[key] = b[key];
      }
    }
  }

  /**
   * Returns true if the given `key` is an own property of `obj`.
   */

  function hasOwn(obj, key) {
    return Object.prototype.hasOwnProperty.call(obj, key);
  }

  /*!
   * Determine if an object is a Buffer
   *
   * @author   Feross Aboukhadijeh <https://feross.org>
   * @license  MIT
   */

  // The _isBuffer check is for Safari 5-7 support, because it's missing
  // Object.prototype.constructor. Remove this eventually
  var isBuffer_1 = function (obj) {
    return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
  };

  function isBuffer (obj) {
    return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
  }

  // For Node v0.10 support. Remove this eventually.
  function isSlowBuffer (obj) {
    return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
  }

  var toString = Object.prototype.toString;

  /**
   * Get the native `typeof` a value.
   *
   * @param  {*} `val`
   * @return {*} Native javascript type
   */

  var kindOf = function kindOf(val) {
    // primitivies
    if (typeof val === 'undefined') {
      return 'undefined';
    }
    if (val === null) {
      return 'null';
    }
    if (val === true || val === false || val instanceof Boolean) {
      return 'boolean';
    }
    if (typeof val === 'string' || val instanceof String) {
      return 'string';
    }
    if (typeof val === 'number' || val instanceof Number) {
      return 'number';
    }

    // functions
    if (typeof val === 'function' || val instanceof Function) {
      return 'function';
    }

    // array
    if (typeof Array.isArray !== 'undefined' && Array.isArray(val)) {
      return 'array';
    }

    // check for instances of RegExp and Date before calling `toString`
    if (val instanceof RegExp) {
      return 'regexp';
    }
    if (val instanceof Date) {
      return 'date';
    }

    // other objects
    var type = toString.call(val);

    if (type === '[object RegExp]') {
      return 'regexp';
    }
    if (type === '[object Date]') {
      return 'date';
    }
    if (type === '[object Arguments]') {
      return 'arguments';
    }
    if (type === '[object Error]') {
      return 'error';
    }

    // buffer
    if (isBuffer_1(val)) {
      return 'buffer';
    }

    // es6: Map, WeakMap, Set, WeakSet
    if (type === '[object Set]') {
      return 'set';
    }
    if (type === '[object WeakSet]') {
      return 'weakset';
    }
    if (type === '[object Map]') {
      return 'map';
    }
    if (type === '[object WeakMap]') {
      return 'weakmap';
    }
    if (type === '[object Symbol]') {
      return 'symbol';
    }

    // typed arrays
    if (type === '[object Int8Array]') {
      return 'int8array';
    }
    if (type === '[object Uint8Array]') {
      return 'uint8array';
    }
    if (type === '[object Uint8ClampedArray]') {
      return 'uint8clampedarray';
    }
    if (type === '[object Int16Array]') {
      return 'int16array';
    }
    if (type === '[object Uint16Array]') {
      return 'uint16array';
    }
    if (type === '[object Int32Array]') {
      return 'int32array';
    }
    if (type === '[object Uint32Array]') {
      return 'uint32array';
    }
    if (type === '[object Float32Array]') {
      return 'float32array';
    }
    if (type === '[object Float64Array]') {
      return 'float64array';
    }

    // must be a plain object
    return 'object';
  };

  var condenseNewlines = function(str, options) {
    var opts = extendShallow({}, options);
    var sep = opts.sep || '\n\n';
    var min = opts.min;
    var re;

    if (typeof min === 'number' && min !== 2) {
      re = new RegExp('(\\r\\n|\\n|\\u2424) {' + min + ',}');
    }
    if (typeof re === 'undefined') {
      re = opts.regex || /(\r\n|\n|\u2424){2,}/g;
    }

    // if a line is 100% whitespace it will be trimmed, so that
    // later we can condense newlines correctly
    if (opts.keepWhitespace !== true) {
      str = str.split('\n').map(function(line) {
        return isWhitespace(line) ? line.trim() : line;
      }).join('\n');
    }

    str = trailingNewline(str, opts);
    return str.replace(re, sep);
  };

  function trailingNewline(str, options) {
    var val = options.trailingNewline;
    if (val === false) {
      return str;
    }

    switch (kindOf(val)) {
      case 'string':
        str = str.replace(/\s+$/, options.trailingNewline);
        break;
      case 'function':
        str = options.trailingNewline(str);
        break;
      case 'undefined':
      case 'boolean':
      default: {
        str = str.replace(/\s+$/, '\n');
        break;
      }
    }
    return str;
  }

  var defaults = {
    unformatted: ['code', 'pre', 'em', 'strong', 'span'],
    indent_inner_html: true,
    indent_char: ' ',
    indent_size: 2,
    sep: '\n'
  };

  var pretty = function pretty(str, options) {
    var opts = extendShallow({}, defaults, options);
    str = js$1.html(str, opts);

    if (opts.ocd === true) {
      if (opts.newlines) { opts.sep = opts.newlines; }
      return ocd(str, opts);
    }

    return str;
  };

  function ocd(str, options) {
    // Normalize and condense all newlines
    return condenseNewlines(str, options)
      // Remove empty whitespace the top of a file.
      .replace(/^\s+/g, '')
      // Remove extra whitespace from eof
      .replace(/\s+$/g, '\n')

      // Add a space above each comment
      .replace(/(\s*<!--)/g, '\n$1')
      // Bring closing comments up to the same line as closing tag.
      .replace(/>(\s*)(?=<!--\s*\/)/g, '> ');
  }

  // 

  function getSelectorType(selector) {
    if (isDomSelector(selector)) { return DOM_SELECTOR }
    if (isVueComponent(selector)) { return COMPONENT_SELECTOR }
    if (isNameSelector(selector)) { return NAME_SELECTOR }
    if (isRefSelector(selector)) { return REF_SELECTOR }

    return INVALID_SELECTOR
  }

  function getSelector(
    selector,
    methodName
  ) {
    var type = getSelectorType(selector);
    if (type === INVALID_SELECTOR) {
      throwError(
        "wrapper." + methodName + "() must be passed a valid CSS selector, Vue " +
          "constructor, or valid find option object"
      );
    }
    return {
      type: type,
      value: selector
    }
  }

  // 

  var WrapperArray = function WrapperArray(wrappers) {
    var length = wrappers.length;
    // $FlowIgnore
    Object.defineProperty(this, 'wrappers', {
      get: function () { return wrappers; },
      set: function () { return throwError('wrapperArray.wrappers is read-only'); }
    });
    // $FlowIgnore
    Object.defineProperty(this, 'length', {
      get: function () { return length; },
      set: function () { return throwError('wrapperArray.length is read-only'); }
    });
  };

  WrapperArray.prototype.at = function at (index) {
    var normalizedIndex = index < 0 ? this.length + index : index;
    if (normalizedIndex > this.length - 1 || normalizedIndex < 0) {
      var error = "no item exists at " + index;
      error += index < 0 ? (" (normalized to " + normalizedIndex + ")") : '';
      throwError(error);
    }
    return this.wrappers[normalizedIndex]
  };

  WrapperArray.prototype.attributes = function attributes () {
    this.throwErrorIfWrappersIsEmpty('attributes');

    throwError(
      "attributes must be called on a single wrapper, use " +
        "at(i) to access a wrapper"
    );
  };

  WrapperArray.prototype.classes = function classes () {
    this.throwErrorIfWrappersIsEmpty('classes');

    throwError(
      "classes must be called on a single wrapper, use " +
        "at(i) to access a wrapper"
    );
  };

  WrapperArray.prototype.contains = function contains (selector) {
    this.throwErrorIfWrappersIsEmpty('contains');

    return this.wrappers.every(function (wrapper) { return wrapper.contains(selector); })
  };

  WrapperArray.prototype.exists = function exists () {
    return this.length > 0 && this.wrappers.every(function (wrapper) { return wrapper.exists(); })
  };

  WrapperArray.prototype.filter = function filter (predicate) {
    return new WrapperArray(this.wrappers.filter(predicate))
  };

  WrapperArray.prototype.emitted = function emitted () {
    this.throwErrorIfWrappersIsEmpty('emitted');

    throwError(
      "emitted must be called on a single wrapper, use " +
        "at(i) to access a wrapper"
    );
  };

  WrapperArray.prototype.emittedByOrder = function emittedByOrder () {
    this.throwErrorIfWrappersIsEmpty('emittedByOrder');

    throwError(
      "emittedByOrder must be called on a single wrapper, " +
        "use at(i) to access a wrapper"
    );
  };

  WrapperArray.prototype.findAll = function findAll () {
    this.throwErrorIfWrappersIsEmpty('findAll');

    throwError(
      "findAll must be called on a single wrapper, use " +
        "at(i) to access a wrapper"
    );
  };

  WrapperArray.prototype.find = function find () {
    this.throwErrorIfWrappersIsEmpty('find');

    throwError(
      "find must be called on a single wrapper, use at(i) " +
        "to access a wrapper"
    );
  };

  WrapperArray.prototype.html = function html () {
    this.throwErrorIfWrappersIsEmpty('html');

    throwError(
      "html must be called on a single wrapper, use at(i) " +
        "to access a wrapper"
    );
  };

  WrapperArray.prototype.is = function is (selector) {
    this.throwErrorIfWrappersIsEmpty('is');

    return this.wrappers.every(function (wrapper) { return wrapper.is(selector); })
  };

  WrapperArray.prototype.isEmpty = function isEmpty () {
    this.throwErrorIfWrappersIsEmpty('isEmpty');

    return this.wrappers.every(function (wrapper) { return wrapper.isEmpty(); })
  };

  WrapperArray.prototype.isVisible = function isVisible () {
    this.throwErrorIfWrappersIsEmpty('isVisible');

    return this.wrappers.every(function (wrapper) { return wrapper.isVisible(); })
  };

  WrapperArray.prototype.isVueInstance = function isVueInstance () {
    this.throwErrorIfWrappersIsEmpty('isVueInstance');

    return this.wrappers.every(function (wrapper) { return wrapper.isVueInstance(); })
  };

  WrapperArray.prototype.name = function name () {
    this.throwErrorIfWrappersIsEmpty('name');

    throwError(
      "name must be called on a single wrapper, use at(i) " +
        "to access a wrapper"
    );
  };

  WrapperArray.prototype.overview = function overview () {
    this.throwErrorIfWrappersIsEmpty('overview()');

    throwError(
      "overview() must be called on a single wrapper, use at(i) " +
        "to access a wrapper"
    );
  };

  WrapperArray.prototype.props = function props () {
    this.throwErrorIfWrappersIsEmpty('props');

    throwError(
      "props must be called on a single wrapper, use " +
        "at(i) to access a wrapper"
    );
  };

  WrapperArray.prototype.text = function text () {
    this.throwErrorIfWrappersIsEmpty('text');

    throwError(
      "text must be called on a single wrapper, use at(i) " +
        "to access a wrapper"
    );
  };

  WrapperArray.prototype.throwErrorIfWrappersIsEmpty = function throwErrorIfWrappersIsEmpty (method) {
    if (this.wrappers.length === 0) {
      throwError((method + " cannot be called on 0 items"));
    }
  };

  WrapperArray.prototype.setData = function setData (data) {
    this.throwErrorIfWrappersIsEmpty('setData');

    return Promise.all(this.wrappers.map(function (wrapper) { return wrapper.setData(data); }))
  };

  WrapperArray.prototype.setMethods = function setMethods (props) {
    this.throwErrorIfWrappersIsEmpty('setMethods');

    this.wrappers.forEach(function (wrapper) { return wrapper.setMethods(props); });
  };

  WrapperArray.prototype.setProps = function setProps (props) {
    this.throwErrorIfWrappersIsEmpty('setProps');

    return Promise.all(this.wrappers.map(function (wrapper) { return wrapper.setProps(props); }))
  };

  WrapperArray.prototype.setValue = function setValue (value) {
    this.throwErrorIfWrappersIsEmpty('setValue');

    return Promise.all(this.wrappers.map(function (wrapper) { return wrapper.setValue(value); }))
  };

  WrapperArray.prototype.setChecked = function setChecked (checked) {
      if ( checked === void 0 ) checked = true;

    this.throwErrorIfWrappersIsEmpty('setChecked');

    return Promise.all(
      this.wrappers.map(function (wrapper) { return wrapper.setChecked(checked); })
    )
  };

  WrapperArray.prototype.setSelected = function setSelected () {
    this.throwErrorIfWrappersIsEmpty('setSelected');

    throwError(
      "setSelected must be called on a single wrapper, " +
        "use at(i) to access a wrapper"
    );
  };

  WrapperArray.prototype.trigger = function trigger (event, options) {
    this.throwErrorIfWrappersIsEmpty('trigger');

    return Promise.all(
      this.wrappers.map(function (wrapper) { return wrapper.trigger(event, options); })
    )
  };

  WrapperArray.prototype.destroy = function destroy () {
    this.throwErrorIfWrappersIsEmpty('destroy');

    this.wrappers.forEach(function (wrapper) { return wrapper.destroy(); });
  };

  // 

  var buildSelectorString = function (selector) {
    if (getSelectorType(selector) === REF_SELECTOR) {
      return ("ref=\"" + (selector.value.ref) + "\"")
    }

    if (typeof selector === 'string') {
      return selector
    }

    return 'Component'
  };

  var ErrorWrapper = function ErrorWrapper(selector) {
    this.selector = selector;
  };

  ErrorWrapper.prototype.at = function at () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call at() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.attributes = function attributes () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call attributes() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.classes = function classes () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call classes() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.contains = function contains () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call contains() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.emitted = function emitted () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call emitted() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.emittedByOrder = function emittedByOrder () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call emittedByOrder() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.exists = function exists () {
    return false
  };

  ErrorWrapper.prototype.filter = function filter () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call filter() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.visible = function visible () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call visible() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.hasAttribute = function hasAttribute () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call hasAttribute() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.hasClass = function hasClass () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call hasClass() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.hasProp = function hasProp () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call hasProp() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.hasStyle = function hasStyle () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call hasStyle() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.findAll = function findAll () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call findAll() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.find = function find () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call find() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.html = function html () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call html() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.is = function is () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call is() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.isEmpty = function isEmpty () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call isEmpty() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.isVisible = function isVisible () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call isVisible() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.isVueInstance = function isVueInstance () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call isVueInstance() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.name = function name () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call name() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.overview = function overview () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call overview() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.props = function props () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call props() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.text = function text () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call text() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.setComputed = function setComputed () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call setComputed() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.setData = function setData () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call setData() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.setMethods = function setMethods () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call setMethods() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.setProps = function setProps () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call setProps() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.setValue = function setValue () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call setValue() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.setChecked = function setChecked () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call setChecked() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.setSelected = function setSelected () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call setSelected() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.trigger = function trigger () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call trigger() on empty Wrapper")
    );
  };

  ErrorWrapper.prototype.destroy = function destroy () {
    throwError(
      ("find did not return " + (buildSelectorString(
        this.selector
      )) + ", cannot call destroy() on empty Wrapper")
    );
  };

  /*!
   * isElementVisible
   * Ported from https://github.com/testing-library/jest-dom
   * Licensed under the MIT License.
   */

  function isStyleVisible(element) {
    var ref = element.style;
    var display = ref.display;
    var visibility = ref.visibility;
    var opacity = ref.opacity;
    return (
      display !== 'none' &&
      visibility !== 'hidden' &&
      visibility !== 'collapse' &&
      opacity !== '0' &&
      opacity !== 0
    )
  }

  function isAttributeVisible(element, previousElement) {
    return (
      !element.hasAttribute('hidden') &&
      (element.nodeName === 'DETAILS' && previousElement.nodeName !== 'SUMMARY'
        ? element.hasAttribute('open')
        : true)
    )
  }

  function isElementVisible(element, previousElement) {
    return (
      element.nodeName !== '#comment' &&
      isStyleVisible(element) &&
      isAttributeVisible(element, previousElement) &&
      (!element.parentElement || isElementVisible(element.parentElement, element))
    )
  }

  function recursivelySetData(vm, target, data) {
    Object.keys(data).forEach(function (key) {
      var val = data[key];
      var targetVal = target[key];

      if (
        isPlainObject(val) &&
        isPlainObject(targetVal) &&
        Object.keys(val).length > 0
      ) {
        recursivelySetData(vm, targetVal, val);
      } else {
        vm.$set(target, key, val);
      }
    });
  }

  var abort = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var afterprint = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var animationend = {
  	eventInterface: "AnimationEvent",
  	bubbles: true,
  	cancelable: false
  };
  var animationiteration = {
  	eventInterface: "AnimationEvent",
  	bubbles: true,
  	cancelable: false
  };
  var animationstart = {
  	eventInterface: "AnimationEvent",
  	bubbles: true,
  	cancelable: false
  };
  var appinstalled = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var audioprocess = {
  	eventInterface: "AudioProcessingEvent"
  };
  var audioend = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var audiostart = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var beforeprint = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var beforeunload = {
  	eventInterface: "BeforeUnloadEvent",
  	bubbles: false,
  	cancelable: true
  };
  var beginEvent = {
  	eventInterface: "TimeEvent",
  	bubbles: false,
  	cancelable: false
  };
  var blur = {
  	eventInterface: "FocusEvent",
  	bubbles: false,
  	cancelable: false
  };
  var boundary = {
  	eventInterface: "SpeechSynthesisEvent",
  	bubbles: false,
  	cancelable: false
  };
  var cached = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var canplay = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var canplaythrough = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var change = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: false
  };
  var chargingchange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var chargingtimechange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var checking = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var click = {
  	eventInterface: "MouseEvent",
  	bubbles: true,
  	cancelable: true
  };
  var close = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var complete = {
  	eventInterface: "OfflineAudioCompletionEvent"
  };
  var compositionend = {
  	eventInterface: "CompositionEvent",
  	bubbles: true,
  	cancelable: true
  };
  var compositionstart = {
  	eventInterface: "CompositionEvent",
  	bubbles: true,
  	cancelable: true
  };
  var compositionupdate = {
  	eventInterface: "CompositionEvent",
  	bubbles: true,
  	cancelable: false
  };
  var contextmenu = {
  	eventInterface: "MouseEvent",
  	bubbles: true,
  	cancelable: true
  };
  var copy = {
  	eventInterface: "ClipboardEvent"
  };
  var cut = {
  	eventInterface: "ClipboardEvent",
  	bubbles: true,
  	cancelable: true
  };
  var dblclick = {
  	eventInterface: "MouseEvent",
  	bubbles: true,
  	cancelable: true
  };
  var devicechange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var devicelight = {
  	eventInterface: "DeviceLightEvent",
  	bubbles: false,
  	cancelable: false
  };
  var devicemotion = {
  	eventInterface: "DeviceMotionEvent",
  	bubbles: false,
  	cancelable: false
  };
  var deviceorientation = {
  	eventInterface: "DeviceOrientationEvent",
  	bubbles: false,
  	cancelable: false
  };
  var deviceproximity = {
  	eventInterface: "DeviceProximityEvent",
  	bubbles: false,
  	cancelable: false
  };
  var dischargingtimechange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var DOMActivate = {
  	eventInterface: "UIEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMAttributeNameChanged = {
  	eventInterface: "MutationNameEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMAttrModified = {
  	eventInterface: "MutationEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMCharacterDataModified = {
  	eventInterface: "MutationEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMContentLoaded = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: true
  };
  var DOMElementNameChanged = {
  	eventInterface: "MutationNameEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMFocusIn = {
  	eventInterface: "FocusEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMFocusOut = {
  	eventInterface: "FocusEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMNodeInserted = {
  	eventInterface: "MutationEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMNodeInsertedIntoDocument = {
  	eventInterface: "MutationEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMNodeRemoved = {
  	eventInterface: "MutationEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMNodeRemovedFromDocument = {
  	eventInterface: "MutationEvent",
  	bubbles: true,
  	cancelable: true
  };
  var DOMSubtreeModified = {
  	eventInterface: "MutationEvent"
  };
  var downloading = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var drag = {
  	eventInterface: "DragEvent",
  	bubbles: true,
  	cancelable: true
  };
  var dragend = {
  	eventInterface: "DragEvent",
  	bubbles: true,
  	cancelable: false
  };
  var dragenter = {
  	eventInterface: "DragEvent",
  	bubbles: true,
  	cancelable: true
  };
  var dragleave = {
  	eventInterface: "DragEvent",
  	bubbles: true,
  	cancelable: false
  };
  var dragover = {
  	eventInterface: "DragEvent",
  	bubbles: true,
  	cancelable: true
  };
  var dragstart = {
  	eventInterface: "DragEvent",
  	bubbles: true,
  	cancelable: true
  };
  var drop = {
  	eventInterface: "DragEvent",
  	bubbles: true,
  	cancelable: true
  };
  var durationchange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var emptied = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var end = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var ended = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var endEvent = {
  	eventInterface: "TimeEvent",
  	bubbles: false,
  	cancelable: false
  };
  var error = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var focus = {
  	eventInterface: "FocusEvent",
  	bubbles: false,
  	cancelable: false
  };
  var focusin = {
  	eventInterface: "FocusEvent",
  	bubbles: true,
  	cancelable: false
  };
  var focusout = {
  	eventInterface: "FocusEvent",
  	bubbles: true,
  	cancelable: false
  };
  var fullscreenchange = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: false
  };
  var fullscreenerror = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: false
  };
  var gamepadconnected = {
  	eventInterface: "GamepadEvent",
  	bubbles: false,
  	cancelable: false
  };
  var gamepaddisconnected = {
  	eventInterface: "GamepadEvent",
  	bubbles: false,
  	cancelable: false
  };
  var gotpointercapture = {
  	eventInterface: "PointerEvent",
  	bubbles: false,
  	cancelable: false
  };
  var hashchange = {
  	eventInterface: "HashChangeEvent",
  	bubbles: true,
  	cancelable: false
  };
  var lostpointercapture = {
  	eventInterface: "PointerEvent",
  	bubbles: false,
  	cancelable: false
  };
  var input = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: false
  };
  var invalid = {
  	eventInterface: "Event",
  	cancelable: true,
  	bubbles: false
  };
  var keydown = {
  	eventInterface: "KeyboardEvent",
  	bubbles: true,
  	cancelable: true
  };
  var keypress = {
  	eventInterface: "KeyboardEvent",
  	bubbles: true,
  	cancelable: true
  };
  var keyup = {
  	eventInterface: "KeyboardEvent",
  	bubbles: true,
  	cancelable: true
  };
  var languagechange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var levelchange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var load = {
  	eventInterface: "UIEvent",
  	bubbles: false,
  	cancelable: false
  };
  var loadeddata = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var loadedmetadata = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var loadend = {
  	eventInterface: "ProgressEvent",
  	bubbles: false,
  	cancelable: false
  };
  var loadstart = {
  	eventInterface: "ProgressEvent",
  	bubbles: false,
  	cancelable: false
  };
  var mark = {
  	eventInterface: "SpeechSynthesisEvent",
  	bubbles: false,
  	cancelable: false
  };
  var message = {
  	eventInterface: "MessageEvent",
  	bubbles: false,
  	cancelable: false
  };
  var messageerror = {
  	eventInterface: "MessageEvent",
  	bubbles: false,
  	cancelable: false
  };
  var mousedown = {
  	eventInterface: "MouseEvent",
  	bubbles: true,
  	cancelable: true
  };
  var mouseenter = {
  	eventInterface: "MouseEvent",
  	bubbles: false,
  	cancelable: false
  };
  var mouseleave = {
  	eventInterface: "MouseEvent",
  	bubbles: false,
  	cancelable: false
  };
  var mousemove = {
  	eventInterface: "MouseEvent",
  	bubbles: true,
  	cancelable: true
  };
  var mouseout = {
  	eventInterface: "MouseEvent",
  	bubbles: true,
  	cancelable: true
  };
  var mouseover = {
  	eventInterface: "MouseEvent",
  	bubbles: true,
  	cancelable: true
  };
  var mouseup = {
  	eventInterface: "MouseEvent",
  	bubbles: true,
  	cancelable: true
  };
  var nomatch = {
  	eventInterface: "SpeechRecognitionEvent",
  	bubbles: false,
  	cancelable: false
  };
  var notificationclick = {
  	eventInterface: "NotificationEvent",
  	bubbles: false,
  	cancelable: false
  };
  var noupdate = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var obsolete = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var offline = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var online = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var open = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var orientationchange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var pagehide = {
  	eventInterface: "PageTransitionEvent",
  	bubbles: false,
  	cancelable: false
  };
  var pageshow = {
  	eventInterface: "PageTransitionEvent",
  	bubbles: false,
  	cancelable: false
  };
  var paste = {
  	eventInterface: "ClipboardEvent",
  	bubbles: true,
  	cancelable: true
  };
  var pause = {
  	eventInterface: "SpeechSynthesisEvent",
  	bubbles: false,
  	cancelable: false
  };
  var pointercancel = {
  	eventInterface: "PointerEvent",
  	bubbles: true,
  	cancelable: false
  };
  var pointerdown = {
  	eventInterface: "PointerEvent",
  	bubbles: true,
  	cancelable: true
  };
  var pointerenter = {
  	eventInterface: "PointerEvent",
  	bubbles: false,
  	cancelable: false
  };
  var pointerleave = {
  	eventInterface: "PointerEvent",
  	bubbles: false,
  	cancelable: false
  };
  var pointerlockchange = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: false
  };
  var pointerlockerror = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: false
  };
  var pointermove = {
  	eventInterface: "PointerEvent",
  	bubbles: true,
  	cancelable: true
  };
  var pointerout = {
  	eventInterface: "PointerEvent",
  	bubbles: true,
  	cancelable: true
  };
  var pointerover = {
  	eventInterface: "PointerEvent",
  	bubbles: true,
  	cancelable: true
  };
  var pointerup = {
  	eventInterface: "PointerEvent",
  	bubbles: true,
  	cancelable: true
  };
  var play = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var playing = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var popstate = {
  	eventInterface: "PopStateEvent",
  	bubbles: true,
  	cancelable: false
  };
  var progress = {
  	eventInterface: "ProgressEvent",
  	bubbles: false,
  	cancelable: false
  };
  var push = {
  	eventInterface: "PushEvent",
  	bubbles: false,
  	cancelable: false
  };
  var pushsubscriptionchange = {
  	eventInterface: "PushEvent",
  	bubbles: false,
  	cancelable: false
  };
  var ratechange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var readystatechange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var repeatEvent = {
  	eventInterface: "TimeEvent",
  	bubbles: false,
  	cancelable: false
  };
  var reset = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: true
  };
  var resize = {
  	eventInterface: "UIEvent",
  	bubbles: false,
  	cancelable: false
  };
  var resourcetimingbufferfull = {
  	eventInterface: "Performance",
  	bubbles: true,
  	cancelable: true
  };
  var result = {
  	eventInterface: "SpeechRecognitionEvent",
  	bubbles: false,
  	cancelable: false
  };
  var resume = {
  	eventInterface: "SpeechSynthesisEvent",
  	bubbles: false,
  	cancelable: false
  };
  var scroll = {
  	eventInterface: "UIEvent",
  	bubbles: false,
  	cancelable: false
  };
  var seeked = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var seeking = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var select = {
  	eventInterface: "UIEvent",
  	bubbles: true,
  	cancelable: false
  };
  var selectstart = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: true
  };
  var selectionchange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var show = {
  	eventInterface: "MouseEvent",
  	bubbles: false,
  	cancelable: false
  };
  var slotchange = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: false
  };
  var soundend = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var soundstart = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var speechend = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var speechstart = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var stalled = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var start = {
  	eventInterface: "SpeechSynthesisEvent",
  	bubbles: false,
  	cancelable: false
  };
  var storage = {
  	eventInterface: "StorageEvent",
  	bubbles: false,
  	cancelable: false
  };
  var submit = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: true
  };
  var success = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var suspend = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var SVGAbort = {
  	eventInterface: "SVGEvent",
  	bubbles: true,
  	cancelable: false
  };
  var SVGError = {
  	eventInterface: "SVGEvent",
  	bubbles: true,
  	cancelable: false
  };
  var SVGLoad = {
  	eventInterface: "SVGEvent",
  	bubbles: false,
  	cancelable: false
  };
  var SVGResize = {
  	eventInterface: "SVGEvent",
  	bubbles: true,
  	cancelable: false
  };
  var SVGScroll = {
  	eventInterface: "SVGEvent",
  	bubbles: true,
  	cancelable: false
  };
  var SVGUnload = {
  	eventInterface: "SVGEvent",
  	bubbles: false,
  	cancelable: false
  };
  var SVGZoom = {
  	eventInterface: "SVGZoomEvent",
  	bubbles: true,
  	cancelable: false
  };
  var timeout = {
  	eventInterface: "ProgressEvent",
  	bubbles: false,
  	cancelable: false
  };
  var timeupdate = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var touchcancel = {
  	eventInterface: "TouchEvent",
  	bubbles: true,
  	cancelable: false
  };
  var touchend = {
  	eventInterface: "TouchEvent",
  	bubbles: true,
  	cancelable: true
  };
  var touchmove = {
  	eventInterface: "TouchEvent",
  	bubbles: true,
  	cancelable: true
  };
  var touchstart = {
  	eventInterface: "TouchEvent",
  	bubbles: true,
  	cancelable: true
  };
  var transitionend = {
  	eventInterface: "TransitionEvent",
  	bubbles: true,
  	cancelable: true
  };
  var unload = {
  	eventInterface: "UIEvent",
  	bubbles: false
  };
  var updateready = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var userproximity = {
  	eventInterface: "UserProximityEvent",
  	bubbles: false,
  	cancelable: false
  };
  var voiceschanged = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var visibilitychange = {
  	eventInterface: "Event",
  	bubbles: true,
  	cancelable: false
  };
  var volumechange = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var waiting = {
  	eventInterface: "Event",
  	bubbles: false,
  	cancelable: false
  };
  var wheel = {
  	eventInterface: "WheelEvent",
  	bubbles: true,
  	cancelable: true
  };
  var domEventTypes = {
  	abort: abort,
  	afterprint: afterprint,
  	animationend: animationend,
  	animationiteration: animationiteration,
  	animationstart: animationstart,
  	appinstalled: appinstalled,
  	audioprocess: audioprocess,
  	audioend: audioend,
  	audiostart: audiostart,
  	beforeprint: beforeprint,
  	beforeunload: beforeunload,
  	beginEvent: beginEvent,
  	blur: blur,
  	boundary: boundary,
  	cached: cached,
  	canplay: canplay,
  	canplaythrough: canplaythrough,
  	change: change,
  	chargingchange: chargingchange,
  	chargingtimechange: chargingtimechange,
  	checking: checking,
  	click: click,
  	close: close,
  	complete: complete,
  	compositionend: compositionend,
  	compositionstart: compositionstart,
  	compositionupdate: compositionupdate,
  	contextmenu: contextmenu,
  	copy: copy,
  	cut: cut,
  	dblclick: dblclick,
  	devicechange: devicechange,
  	devicelight: devicelight,
  	devicemotion: devicemotion,
  	deviceorientation: deviceorientation,
  	deviceproximity: deviceproximity,
  	dischargingtimechange: dischargingtimechange,
  	DOMActivate: DOMActivate,
  	DOMAttributeNameChanged: DOMAttributeNameChanged,
  	DOMAttrModified: DOMAttrModified,
  	DOMCharacterDataModified: DOMCharacterDataModified,
  	DOMContentLoaded: DOMContentLoaded,
  	DOMElementNameChanged: DOMElementNameChanged,
  	DOMFocusIn: DOMFocusIn,
  	DOMFocusOut: DOMFocusOut,
  	DOMNodeInserted: DOMNodeInserted,
  	DOMNodeInsertedIntoDocument: DOMNodeInsertedIntoDocument,
  	DOMNodeRemoved: DOMNodeRemoved,
  	DOMNodeRemovedFromDocument: DOMNodeRemovedFromDocument,
  	DOMSubtreeModified: DOMSubtreeModified,
  	downloading: downloading,
  	drag: drag,
  	dragend: dragend,
  	dragenter: dragenter,
  	dragleave: dragleave,
  	dragover: dragover,
  	dragstart: dragstart,
  	drop: drop,
  	durationchange: durationchange,
  	emptied: emptied,
  	end: end,
  	ended: ended,
  	endEvent: endEvent,
  	error: error,
  	focus: focus,
  	focusin: focusin,
  	focusout: focusout,
  	fullscreenchange: fullscreenchange,
  	fullscreenerror: fullscreenerror,
  	gamepadconnected: gamepadconnected,
  	gamepaddisconnected: gamepaddisconnected,
  	gotpointercapture: gotpointercapture,
  	hashchange: hashchange,
  	lostpointercapture: lostpointercapture,
  	input: input,
  	invalid: invalid,
  	keydown: keydown,
  	keypress: keypress,
  	keyup: keyup,
  	languagechange: languagechange,
  	levelchange: levelchange,
  	load: load,
  	loadeddata: loadeddata,
  	loadedmetadata: loadedmetadata,
  	loadend: loadend,
  	loadstart: loadstart,
  	mark: mark,
  	message: message,
  	messageerror: messageerror,
  	mousedown: mousedown,
  	mouseenter: mouseenter,
  	mouseleave: mouseleave,
  	mousemove: mousemove,
  	mouseout: mouseout,
  	mouseover: mouseover,
  	mouseup: mouseup,
  	nomatch: nomatch,
  	notificationclick: notificationclick,
  	noupdate: noupdate,
  	obsolete: obsolete,
  	offline: offline,
  	online: online,
  	open: open,
  	orientationchange: orientationchange,
  	pagehide: pagehide,
  	pageshow: pageshow,
  	paste: paste,
  	pause: pause,
  	pointercancel: pointercancel,
  	pointerdown: pointerdown,
  	pointerenter: pointerenter,
  	pointerleave: pointerleave,
  	pointerlockchange: pointerlockchange,
  	pointerlockerror: pointerlockerror,
  	pointermove: pointermove,
  	pointerout: pointerout,
  	pointerover: pointerover,
  	pointerup: pointerup,
  	play: play,
  	playing: playing,
  	popstate: popstate,
  	progress: progress,
  	push: push,
  	pushsubscriptionchange: pushsubscriptionchange,
  	ratechange: ratechange,
  	readystatechange: readystatechange,
  	repeatEvent: repeatEvent,
  	reset: reset,
  	resize: resize,
  	resourcetimingbufferfull: resourcetimingbufferfull,
  	result: result,
  	resume: resume,
  	scroll: scroll,
  	seeked: seeked,
  	seeking: seeking,
  	select: select,
  	selectstart: selectstart,
  	selectionchange: selectionchange,
  	show: show,
  	slotchange: slotchange,
  	soundend: soundend,
  	soundstart: soundstart,
  	speechend: speechend,
  	speechstart: speechstart,
  	stalled: stalled,
  	start: start,
  	storage: storage,
  	submit: submit,
  	success: success,
  	suspend: suspend,
  	SVGAbort: SVGAbort,
  	SVGError: SVGError,
  	SVGLoad: SVGLoad,
  	SVGResize: SVGResize,
  	SVGScroll: SVGScroll,
  	SVGUnload: SVGUnload,
  	SVGZoom: SVGZoom,
  	timeout: timeout,
  	timeupdate: timeupdate,
  	touchcancel: touchcancel,
  	touchend: touchend,
  	touchmove: touchmove,
  	touchstart: touchstart,
  	transitionend: transitionend,
  	unload: unload,
  	updateready: updateready,
  	userproximity: userproximity,
  	voiceschanged: voiceschanged,
  	visibilitychange: visibilitychange,
  	volumechange: volumechange,
  	waiting: waiting,
  	wheel: wheel
  };

  var domEventTypes$1 = /*#__PURE__*/Object.freeze({
    __proto__: null,
    abort: abort,
    afterprint: afterprint,
    animationend: animationend,
    animationiteration: animationiteration,
    animationstart: animationstart,
    appinstalled: appinstalled,
    audioprocess: audioprocess,
    audioend: audioend,
    audiostart: audiostart,
    beforeprint: beforeprint,
    beforeunload: beforeunload,
    beginEvent: beginEvent,
    blur: blur,
    boundary: boundary,
    cached: cached,
    canplay: canplay,
    canplaythrough: canplaythrough,
    change: change,
    chargingchange: chargingchange,
    chargingtimechange: chargingtimechange,
    checking: checking,
    click: click,
    close: close,
    complete: complete,
    compositionend: compositionend,
    compositionstart: compositionstart,
    compositionupdate: compositionupdate,
    contextmenu: contextmenu,
    copy: copy,
    cut: cut,
    dblclick: dblclick,
    devicechange: devicechange,
    devicelight: devicelight,
    devicemotion: devicemotion,
    deviceorientation: deviceorientation,
    deviceproximity: deviceproximity,
    dischargingtimechange: dischargingtimechange,
    DOMActivate: DOMActivate,
    DOMAttributeNameChanged: DOMAttributeNameChanged,
    DOMAttrModified: DOMAttrModified,
    DOMCharacterDataModified: DOMCharacterDataModified,
    DOMContentLoaded: DOMContentLoaded,
    DOMElementNameChanged: DOMElementNameChanged,
    DOMFocusIn: DOMFocusIn,
    DOMFocusOut: DOMFocusOut,
    DOMNodeInserted: DOMNodeInserted,
    DOMNodeInsertedIntoDocument: DOMNodeInsertedIntoDocument,
    DOMNodeRemoved: DOMNodeRemoved,
    DOMNodeRemovedFromDocument: DOMNodeRemovedFromDocument,
    DOMSubtreeModified: DOMSubtreeModified,
    downloading: downloading,
    drag: drag,
    dragend: dragend,
    dragenter: dragenter,
    dragleave: dragleave,
    dragover: dragover,
    dragstart: dragstart,
    drop: drop,
    durationchange: durationchange,
    emptied: emptied,
    end: end,
    ended: ended,
    endEvent: endEvent,
    error: error,
    focus: focus,
    focusin: focusin,
    focusout: focusout,
    fullscreenchange: fullscreenchange,
    fullscreenerror: fullscreenerror,
    gamepadconnected: gamepadconnected,
    gamepaddisconnected: gamepaddisconnected,
    gotpointercapture: gotpointercapture,
    hashchange: hashchange,
    lostpointercapture: lostpointercapture,
    input: input,
    invalid: invalid,
    keydown: keydown,
    keypress: keypress,
    keyup: keyup,
    languagechange: languagechange,
    levelchange: levelchange,
    load: load,
    loadeddata: loadeddata,
    loadedmetadata: loadedmetadata,
    loadend: loadend,
    loadstart: loadstart,
    mark: mark,
    message: message,
    messageerror: messageerror,
    mousedown: mousedown,
    mouseenter: mouseenter,
    mouseleave: mouseleave,
    mousemove: mousemove,
    mouseout: mouseout,
    mouseover: mouseover,
    mouseup: mouseup,
    nomatch: nomatch,
    notificationclick: notificationclick,
    noupdate: noupdate,
    obsolete: obsolete,
    offline: offline,
    online: online,
    open: open,
    orientationchange: orientationchange,
    pagehide: pagehide,
    pageshow: pageshow,
    paste: paste,
    pause: pause,
    pointercancel: pointercancel,
    pointerdown: pointerdown,
    pointerenter: pointerenter,
    pointerleave: pointerleave,
    pointerlockchange: pointerlockchange,
    pointerlockerror: pointerlockerror,
    pointermove: pointermove,
    pointerout: pointerout,
    pointerover: pointerover,
    pointerup: pointerup,
    play: play,
    playing: playing,
    popstate: popstate,
    progress: progress,
    push: push,
    pushsubscriptionchange: pushsubscriptionchange,
    ratechange: ratechange,
    readystatechange: readystatechange,
    repeatEvent: repeatEvent,
    reset: reset,
    resize: resize,
    resourcetimingbufferfull: resourcetimingbufferfull,
    result: result,
    resume: resume,
    scroll: scroll,
    seeked: seeked,
    seeking: seeking,
    select: select,
    selectstart: selectstart,
    selectionchange: selectionchange,
    show: show,
    slotchange: slotchange,
    soundend: soundend,
    soundstart: soundstart,
    speechend: speechend,
    speechstart: speechstart,
    stalled: stalled,
    start: start,
    storage: storage,
    submit: submit,
    success: success,
    suspend: suspend,
    SVGAbort: SVGAbort,
    SVGError: SVGError,
    SVGLoad: SVGLoad,
    SVGResize: SVGResize,
    SVGScroll: SVGScroll,
    SVGUnload: SVGUnload,
    SVGZoom: SVGZoom,
    timeout: timeout,
    timeupdate: timeupdate,
    touchcancel: touchcancel,
    touchend: touchend,
    touchmove: touchmove,
    touchstart: touchstart,
    transitionend: transitionend,
    unload: unload,
    updateready: updateready,
    userproximity: userproximity,
    voiceschanged: voiceschanged,
    visibilitychange: visibilitychange,
    volumechange: volumechange,
    waiting: waiting,
    wheel: wheel,
    'default': domEventTypes
  });

  var require$$0 = getCjsExportFromNamespace(domEventTypes$1);

  var domEventTypes$2 = require$$0;

  var defaultEventType = {
    eventInterface: 'Event',
    cancelable: true,
    bubbles: true
  };

  var modifiers = {
    enter: 13,
    tab: 9,
    delete: 46,
    esc: 27,
    space: 32,
    up: 38,
    down: 40,
    left: 37,
    right: 39,
    end: 35,
    home: 36,
    backspace: 8,
    insert: 45,
    pageup: 33,
    pagedown: 34
  };

  // get from https://github.com/ashubham/w3c-keys/blob/master/index.ts
  var w3cKeys = {
    enter: 'Enter',
    tab: 'Tab',
    delete: 'Delete',
    esc: 'Esc',
    escape: 'Escape',
    space: ' ',
    up: 'Up',
    left: 'Left',
    right: 'Right',
    down: 'Down',
    end: 'End',
    home: 'Home',
    backspace: 'Backspace',
    insert: 'Insert',
    pageup: 'PageUp',
    pagedown: 'PageDown'
  };

  var codeToKeyNameMap = Object.entries(modifiers).reduce(
    function (acc, ref) {
      var obj;

      var key = ref[0];
      var value = ref[1];
      return Object.assign(acc, ( obj = {}, obj[value] = w3cKeys[key], obj ));
  },
    {}
  );

  function getOptions(eventParams) {
    var modifier = eventParams.modifier;
    var meta = eventParams.meta;
    var options = eventParams.options;
    var keyCode = modifiers[modifier] || options.keyCode || options.code;
    var key = codeToKeyNameMap[keyCode];

    return Object.assign({}, options, // What the user passed in as the second argument to #trigger

      {bubbles: meta.bubbles,
      cancelable: meta.cancelable,

      // Any derived options should go here
      keyCode: keyCode,
      code: keyCode,
      key: key || options.key})
  }

  function createEvent(eventParams) {
    var eventType = eventParams.eventType;
    var meta = eventParams.meta; if ( meta === void 0 ) meta = {};

    var SupportedEventInterface =
      typeof window[meta.eventInterface] === 'function'
        ? window[meta.eventInterface]
        : window.Event;

    var event = new SupportedEventInterface(
      eventType,
      // event properties can only be added when the event is instantiated
      // custom properties must be added after the event has been instantiated
      getOptions(eventParams)
    );

    return event
  }

  function createOldEvent(eventParams) {
    var eventType = eventParams.eventType;
    var modifier = eventParams.modifier;
    var meta = eventParams.meta;
    var bubbles = meta.bubbles;
    var cancelable = meta.cancelable;

    var event = document.createEvent('Event');
    event.initEvent(eventType, bubbles, cancelable);
    event.keyCode = modifiers[modifier];
    return event
  }

  function createDOMEvent(type, options) {
    var ref = type.split('.');
    var eventType = ref[0];
    var modifier = ref[1];
    var meta = domEventTypes$2[eventType] || defaultEventType;

    var eventParams = { eventType: eventType, modifier: modifier, meta: meta, options: options };

    // Fallback for IE10,11 - https://stackoverflow.com/questions/26596123
    var event =
      typeof window.Event === 'function'
        ? createEvent(eventParams)
        : createOldEvent(eventParams);

    var eventPrototype = Object.getPrototypeOf(event);
    Object.keys(options || {}).forEach(function (key) {
      var propertyDescriptor = Object.getOwnPropertyDescriptor(
        eventPrototype,
        key
      );

      var canSetProperty = !(
        propertyDescriptor && propertyDescriptor.setter === undefined
      );
      if (canSetProperty) {
        event[key] = options[key];
      }
    });

    return event
  }

  // 

  var Wrapper = function Wrapper(
    node,
    options,
    isVueWrapper
  ) {
    var vnode = node instanceof Element ? null : node;
    var element = node instanceof Element ? node : node.elm;
    // Prevent redefine by VueWrapper
    if (!isVueWrapper) {
      // $FlowIgnore : issue with defineProperty
      Object.defineProperty(this, 'rootNode', {
        get: function () { return vnode || element; },
        set: function () { return throwError('wrapper.rootNode is read-only'); }
      });
      // $FlowIgnore
      Object.defineProperty(this, 'vnode', {
        get: function () { return vnode; },
        set: function () { return throwError('wrapper.vnode is read-only'); }
      });
      // $FlowIgnore
      Object.defineProperty(this, 'element', {
        get: function () { return element; },
        set: function () { return throwError('wrapper.element is read-only'); }
      });
      // $FlowIgnore
      Object.defineProperty(this, 'vm', {
        get: function () { return undefined; },
        set: function () { return throwError('wrapper.vm is read-only'); }
      });
    }
    var frozenOptions = Object.freeze(options);
    // $FlowIgnore
    Object.defineProperty(this, 'options', {
      get: function () { return frozenOptions; },
      set: function () { return throwError('wrapper.options is read-only'); }
    });
    if (
      this.vnode &&
      (this.vnode[FUNCTIONAL_OPTIONS] || this.vnode.functionalContext)
    ) {
      this.isFunctionalComponent = true;
    }
  };

  /**
   * Prints warning if component is destroyed
   */
  Wrapper.prototype.__warnIfDestroyed = function __warnIfDestroyed () {
    if (!this.exists()) {
      warn('Operations on destroyed component are discouraged');
    }
  };

  Wrapper.prototype.at = function at () {
    this.__warnIfDestroyed();

    throwError('at() must be called on a WrapperArray');
  };

  /**
   * Returns an Object containing all the attribute/value pairs on the element.
   */
  Wrapper.prototype.attributes = function attributes (key) {
    this.__warnIfDestroyed();

    var attributes = this.element.attributes;
    var attributeMap = {};
    for (var i = 0; i < attributes.length; i++) {
      var att = attributes.item(i);
      attributeMap[att.localName] = att.value;
    }

    return key ? attributeMap[key] : attributeMap
  };

  /**
   * Returns an Array containing all the classes on the element
   */
  Wrapper.prototype.classes = function classes (className) {
      var this$1 = this;

    this.__warnIfDestroyed();

    var classAttribute = this.element.getAttribute('class');
    var classes = classAttribute ? classAttribute.split(' ') : [];
    // Handle converting cssmodules identifiers back to the original class name
    if (this.vm && this.vm.$style) {
      var cssModuleIdentifiers = Object.keys(this.vm.$style).reduce(
        function (acc, key) {
          // $FlowIgnore
          var moduleIdent = this$1.vm.$style[key];
          if (moduleIdent) {
            acc[moduleIdent.split(' ')[0]] = key;
          }
          return acc
        },
        {}
      );
      classes = classes.map(function (name) { return cssModuleIdentifiers[name] || name; });
    }

    return className ? !!(classes.indexOf(className) > -1) : classes
  };

  /**
   * Checks if wrapper contains provided selector.
   * @deprecated
   */
  Wrapper.prototype.contains = function contains (rawSelector) {
    warnDeprecated(
      'contains',
      'Use `wrapper.find`, `wrapper.findComponent` or `wrapper.get` instead'
    );

    this.__warnIfDestroyed();

    var selector = getSelector(rawSelector, 'contains');
    var nodes = find(this.rootNode, this.vm, selector);
    return nodes.length > 0
  };

  /**
   * Calls destroy on vm
   */
  Wrapper.prototype.destroy = function destroy () {
    if (!this.vm && !this.isFunctionalComponent) {
      throwError(
        "wrapper.destroy() can only be called on a Vue instance or " +
          "functional component."
      );
    }

    if (this.element.parentNode) {
      this.element.parentNode.removeChild(this.element);
    }

    if (this.vm) {
      // $FlowIgnore
      this.vm.$destroy();
      throwIfInstancesThrew(this.vm);
    }
  };

  /**
   * Returns an object containing custom events emitted by the Wrapper vm
   */
  Wrapper.prototype.emitted = function emitted (
    event
  ) {
    if (!this._emitted && !this.vm) {
      throwError("wrapper.emitted() can only be called on a Vue instance");
    }
    if (event) {
      return this._emitted[event]
    }
    return this._emitted
  };

  /**
   * Returns an Array containing custom events emitted by the Wrapper vm
   * @deprecated
   */
  Wrapper.prototype.emittedByOrder = function emittedByOrder () {
    warnDeprecated('emittedByOrder', 'Use `wrapper.emitted` instead');
    if (!this._emittedByOrder && !this.vm) {
      throwError(
        "wrapper.emittedByOrder() can only be called on a Vue instance"
      );
    }
    return this._emittedByOrder
  };

  /**
   * Utility to check wrapper exists.
   */
  Wrapper.prototype.exists = function exists () {
    if (this.vm) {
      return !!this.vm && !this.vm._isDestroyed
    }
    return true
  };

  Wrapper.prototype.filter = function filter () {
    throwError('filter() must be called on a WrapperArray');
  };

  /**
   * Gets first node in tree of the current wrapper that
   * matches the provided selector.
   */
  Wrapper.prototype.get = function get (rawSelector) {
    this.__warnIfDestroyed();

    var found = this.find(rawSelector);
    if (found instanceof ErrorWrapper) {
      throw new Error(("Unable to find " + rawSelector + " within: " + (this.html())))
    }
    return found
  };

  /**
   * Gets first node in tree of the current wrapper that
   * matches the provided selector.
   */
  Wrapper.prototype.getComponent = function getComponent (rawSelector) {
    this.__warnIfDestroyed();

    var found = this.findComponent(rawSelector);
    if (found instanceof ErrorWrapper) {
      throw new Error(("Unable to get " + rawSelector + " within: " + (this.html())))
    }
    return found
  };

  /**
   * Finds first DOM node in tree of the current wrapper that
   * matches the provided selector.
   */
  Wrapper.prototype.find = function find (rawSelector) {
    this.__warnIfDestroyed();

    var selector = getSelector(rawSelector, 'find');
    if (selector.type !== DOM_SELECTOR) {
      warnDeprecated(
        'finding components with `find` or `get`',
        'Use `findComponent` and `getComponent` instead'
      );
    }

    return this.__find(rawSelector, selector)
  };

  /**
   * Finds first component in tree of the current wrapper that
   * matches the provided selector.
   */
  Wrapper.prototype.findComponent = function findComponent (rawSelector) {
    this.__warnIfDestroyed();

    var selector = getSelector(rawSelector, 'findComponent');

    return this.__find(rawSelector, selector)
  };

  Wrapper.prototype.__find = function __find (rawSelector, selector) {
    var node = find(this.rootNode, this.vm, selector)[0];

    if (!node) {
      return new ErrorWrapper(rawSelector)
    }

    var wrapper = createWrapper(node, this.options);
    wrapper.selector = rawSelector;
    return wrapper
  };

  /**
   * Finds DOM elements in tree of the current wrapper that matches
   * the provided selector.
   */
  Wrapper.prototype.findAll = function findAll (rawSelector) {
    this.__warnIfDestroyed();

    var selector = getSelector(rawSelector, 'findAll');
    if (selector.type !== DOM_SELECTOR) {
      warnDeprecated(
        'finding components with `findAll`',
        'Use `findAllComponents` instead'
      );
    }
    return this.__findAll(rawSelector, selector)
  };

  /**
   * Finds components in tree of the current wrapper that matches
   * the provided selector.
   */
  Wrapper.prototype.findAllComponents = function findAllComponents (rawSelector) {
    this.__warnIfDestroyed();

    var selector = getSelector(rawSelector, 'findAll');

    return this.__findAll(rawSelector, selector, isVueWrapper)
  };

  Wrapper.prototype.__findAll = function __findAll (
    rawSelector,
    selector,
    filterFn
  ) {
      var this$1 = this;
      if ( filterFn === void 0 ) filterFn = function () { return true; };

    var nodes = find(this.rootNode, this.vm, selector);
    var wrappers = nodes
      .map(function (node) {
        // Using CSS Selector, returns a VueWrapper instance if the root element
        // binds a Vue instance.
        var wrapper = createWrapper(node, this$1.options);
        wrapper.selector = rawSelector;
        return wrapper
      })
      .filter(filterFn);

    var wrapperArray = new WrapperArray(wrappers);
    wrapperArray.selector = rawSelector;
    return wrapperArray
  };

  /**
   * Returns HTML of element as a string
   */
  Wrapper.prototype.html = function html () {
    this.__warnIfDestroyed();

    return pretty(this.element.outerHTML)
  };

  /**
   * Checks if node matches selector or component definition
   */
  Wrapper.prototype.is = function is (rawSelector) {
    this.__warnIfDestroyed();

    var selector = getSelector(rawSelector, 'is');

    if (selector.type === DOM_SELECTOR) {
      warnDeprecated(
        'checking tag name with `is`',
        'Use `element.tagName` instead'
      );
    }

    if (selector.type === REF_SELECTOR) {
      throwError('$ref selectors can not be used with wrapper.is()');
    }

    return matches(this.rootNode, selector)
  };

  /**
   * Checks if node is empty
   * @deprecated
   */
  Wrapper.prototype.isEmpty = function isEmpty () {
    warnDeprecated(
      'isEmpty',
      'Consider a custom matcher such as those provided in jest-dom: https://github.com/testing-library/jest-dom#tobeempty. ' +
        'When using with findComponent, access the DOM element with findComponent(Comp).element'
    );
    this.__warnIfDestroyed();

    if (!this.vnode) {
      return this.element.innerHTML === ''
    }
    var nodes = [];
    var node = this.vnode;
    var i = 0;

    while (node) {
      if (node.child) {
        nodes.push(node.child._vnode);
      }
      node.children &&
        node.children.forEach(function (n) {
          nodes.push(n);
        });
      node = nodes[i++];
    }
    return nodes.every(function (n) { return n.isComment || n.child; })
  };

  /**
   * Checks if node is visible
   */
  Wrapper.prototype.isVisible = function isVisible () {
    this.__warnIfDestroyed();

    return isElementVisible(this.element)
  };

  /**
   * Checks if wrapper is a vue instance
   * @deprecated
   */
  Wrapper.prototype.isVueInstance = function isVueInstance () {
    warnDeprecated("isVueInstance");
    this.__warnIfDestroyed();

    return !!this.vm
  };

  /**
   * Returns name of component, or tag name if node is not a Vue component
   * @deprecated
   */
  Wrapper.prototype.name = function name () {
    warnDeprecated("name");
    this.__warnIfDestroyed();

    if (this.vm) {
      return (
        this.vm.$options.name ||
        // compat for Vue < 2.3
        (this.vm.$options.extendOptions && this.vm.$options.extendOptions.name)
      )
    }

    if (!this.vnode) {
      return this.element.tagName
    }

    return this.vnode.tag
  };

  /**
   * Prints a simple overview of the wrapper current state
   * with useful information for debugging
   * @deprecated
   */
  Wrapper.prototype.overview = function overview () {
      var this$1 = this;

    warnDeprecated("overview");
    this.__warnIfDestroyed();

    if (!this.vm) {
      throwError("wrapper.overview() can only be called on a Vue instance");
    }

    var identation = 4;
    var formatJSON = function (json, replacer) {
          if ( replacer === void 0 ) replacer = null;

          return JSON.stringify(json, replacer, identation).replace(/"/g, '');
      };

    var visibility = this.isVisible() ? 'Visible' : 'Not visible';

    var html = this.html()
      ? this.html().replace(/^(?!\s*$)/gm, ' '.repeat(identation)) + '\n'
      : '';

    // $FlowIgnore
    var data = formatJSON(this.vm.$data);

    /* eslint-disable operator-linebreak */
    // $FlowIgnore
    var computed = this.vm._computedWatchers
      ? formatJSON.apply(
          // $FlowIgnore
          void 0, Object.keys(this.vm._computedWatchers).map(function (computedKey) {
              var obj;

              return (( obj = {}, obj[computedKey] = this$1.vm[computedKey], obj ));
      })
        )
      : // $FlowIgnore
      this.vm.$options.computed
      ? formatJSON.apply(
          // $FlowIgnore
          void 0, Object.entries(this.vm.$options.computed).map(function (ref) {
              var obj;

              var key = ref[0];
              var value = ref[1];
              return (( obj = {}, obj[key] = value(), obj ));
      })
        )
      : '{}';
    /* eslint-enable operator-linebreak */

    var emittedJSONReplacer = function (key, value) { return value instanceof Array
        ? value.map(function (calledWith, index) {
            var callParams = calledWith.map(function (param) { return typeof param === 'object'
                ? JSON.stringify(param)
                    .replace(/"/g, '')
                    .replace(/,/g, ', ')
                : param; }
            );

            return (index + ": [ " + (callParams.join(', ')) + " ]")
          })
        : value; };

    var emitted = formatJSON(this.emitted(), emittedJSONReplacer);

    console.log(
      '\n' +
        "Wrapper (" + visibility + "):\n\n" +
        "Html:\n" + html + "\n" +
        "Data: " + data + "\n\n" +
        "Computed: " + computed + "\n\n" +
        "Emitted: " + emitted + "\n"
    );
  };

  /**
   * Returns an Object containing the prop name/value pairs on the element
   */
  Wrapper.prototype.props = function props (key) {
      var this$1 = this;

    if (this.isFunctionalComponent) {
      throwError(
        "wrapper.props() cannot be called on a mounted functional component."
      );
    }
    if (!this.vm) {
      throwError('wrapper.props() must be called on a Vue instance');
    }
    this.__warnIfDestroyed();

    var props = {};
    var keys = this.vm && this.vm.$options._propKeys;

    if (keys) {
  (keys || {}).forEach(function (key) {
        if (this$1.vm) {
          props[key] = this$1.vm[key];
        }
      });
    }

    if (key) {
      return props[key]
    }

    return props
  };

  /**
   * Checks radio button or checkbox element
   * @deprecated
   */
  Wrapper.prototype.setChecked = function setChecked (checked) {
      if ( checked === void 0 ) checked = true;

    this.__warnIfDestroyed();

    if (typeof checked !== 'boolean') {
      throwError('wrapper.setChecked() must be passed a boolean');
    }
    var tagName = this.element.tagName;
    // $FlowIgnore
    var type = this.attributes().type;
    var event = getCheckedEvent();

    if (tagName === 'INPUT' && type === 'checkbox') {
      // $FlowIgnore
      if (this.element.checked === checked) {
        return nextTick()
      }
      if (event !== 'click' || isPhantomJS) {
        // $FlowIgnore
        this.element.checked = checked;
      }
      return this.trigger(event)
    }

    if (tagName === 'INPUT' && type === 'radio') {
      if (!checked) {
        throwError(
          "wrapper.setChecked() cannot be called with parameter false on a " +
            "<input type=\"radio\" /> element."
        );
      }

      // $FlowIgnore
      if (this.element.checked === checked) {
        return nextTick()
      }

      if (event !== 'click' || isPhantomJS) {
        // $FlowIgnore
        this.element.selected = true;
      }
      return this.trigger(event)
    }

    throwError("wrapper.setChecked() cannot be called on this element");
    return nextTick()
  };

  /**
   * Selects <option></option> element
   * @deprecated
   */
  Wrapper.prototype.setSelected = function setSelected () {
    this.__warnIfDestroyed();

    var tagName = this.element.tagName;

    if (tagName === 'SELECT') {
      throwError(
        "wrapper.setSelected() cannot be called on select. Call it on one of " +
          "its options"
      );
    }

    if (tagName !== 'OPTION') {
      throwError("wrapper.setSelected() cannot be called on this element");
    }

    // $FlowIgnore
    if (this.element.selected) {
      return nextTick()
    }

    // $FlowIgnore
    this.element.selected = true;
    // $FlowIgnore
    var parentElement = this.element.parentElement;

    // $FlowIgnore
    if (parentElement.tagName === 'OPTGROUP') {
      // $FlowIgnore
      parentElement = parentElement.parentElement;
    }

    // $FlowIgnore
    return createWrapper(parentElement, this.options).trigger('change')
  };

  /**
   * Sets vm data
   */
  Wrapper.prototype.setData = function setData (data) {
    if (this.isFunctionalComponent) {
      throwError("wrapper.setData() cannot be called on a functional component");
    }

    if (!this.vm) {
      throwError("wrapper.setData() can only be called on a Vue instance");
    }

    this.__warnIfDestroyed();

    recursivelySetData(this.vm, this.vm, data);
    return nextTick()
  };

  /**
   * Sets vm methods
   * @deprecated
   */
  Wrapper.prototype.setMethods = function setMethods (methods) {
      var this$1 = this;

    warnDeprecated(
      "setMethods",
      "There is no clear migration path for setMethods - Vue does not support arbitrarily replacement of methods, nor should VTU. To stub a complex method extract it from the component and test it in isolation. Otherwise, the suggestion is to rethink those tests"
    );

    if (!this.vm) {
      throwError("wrapper.setMethods() can only be called on a Vue instance");
    }
    this.__warnIfDestroyed();

    Object.keys(methods).forEach(function (key) {
      // $FlowIgnore : Problem with possibly null this.vm
      this$1.vm[key] = methods[key];
      // $FlowIgnore : Problem with possibly null this.vm
      this$1.vm.$options.methods[key] = methods[key];
    });

    if (this.vnode) {
      var context = this.vnode.context;
      if (context.$options.render) { context._update(context._render()); }
    }
  };

  /**
   * Sets vm props
   */
  Wrapper.prototype.setProps = function setProps (data) {
      var this$1 = this;

    // Validate the setProps method call
    if (this.isFunctionalComponent) {
      throwError(
        "wrapper.setProps() cannot be called on a functional component"
      );
    }

    if (!this.vm) {
      throwError("wrapper.setProps() can only be called on a Vue instance");
    }

    // $FlowIgnore : Problem with possibly null this.vm
    if (!this.vm.$parent.$options.$_isWrapperParent) {
      throwError(
        "wrapper.setProps() can only be called for top-level component"
      );
    }

    this.__warnIfDestroyed();

    Object.keys(data).forEach(function (key) {
      // Don't let people set entire objects, because reactivity won't work
      if (
        typeof data[key] === 'object' &&
        data[key] !== null &&
        // $FlowIgnore : Problem with possibly null this.vm
        data[key] === this$1.vm[key]
      ) {
        throwError(
          "wrapper.setProps() called with the same object of the existing " +
            key + " property. You must call wrapper.setProps() with a new " +
            "object to trigger reactivity"
        );
      }

      if (
        VUE_VERSION <= 2.3 &&
        (!this$1.vm ||
          !this$1.vm.$options._propKeys ||
          !this$1.vm.$options._propKeys.some(function (prop) { return prop === key; }))
      ) {
        throwError(
          "wrapper.setProps() called with " + key + " property which " +
            "is not defined on the component"
        );
      }

      // $FlowIgnore : Problem with possibly null this.vm
      var parent = this$1.vm.$parent;
      parent.$set(parent.vueTestUtils_childProps, key, data[key]);
    });

    return nextTick()
  };

  /**
   * Sets element value and triggers input event
   */
  Wrapper.prototype.setValue = function setValue (value) {
    var tagName = this.element.tagName;
    // $FlowIgnore
    var type = this.attributes().type;
    this.__warnIfDestroyed();

    if (tagName === 'OPTION') {
      throwError(
        "wrapper.setValue() cannot be called on an <option> element. Use " +
          "wrapper.setSelected() instead"
      );
    } else if (tagName === 'INPUT' && type === 'checkbox') {
      throwError(
        "wrapper.setValue() cannot be called on a <input type=\"checkbox\" /> " +
          "element. Use wrapper.setChecked() instead"
      );
    } else if (tagName === 'INPUT' && type === 'radio') {
      throwError(
        "wrapper.setValue() cannot be called on a <input type=\"radio\" /> " +
          "element. Use wrapper.setChecked() instead"
      );
    } else if (tagName === 'SELECT') {
      if (Array.isArray(value)) {
        // $FlowIgnore
        var options = this.element.options;
        for (var i = 0; i < options.length; i++) {
          var option = options[i];
          option.selected = value.indexOf(option.value) >= 0;
        }
      } else {
        // $FlowIgnore
        this.element.value = value;
      }

      this.trigger('change');
      return nextTick()
    } else if (tagName === 'INPUT' || tagName === 'TEXTAREA') {
      // $FlowIgnore
      this.element.value = value;

      this.trigger('input');

      // for v-model.lazy, we need to trigger a change event, too.
      // $FlowIgnore
      if (this.element._vModifiers && this.element._vModifiers.lazy) {
        this.trigger('change');
      }
      return nextTick()
    }
    throwError("wrapper.setValue() cannot be called on this element");
    return nextTick()
  };

  /**
   * Return text of wrapper element
   */
  Wrapper.prototype.text = function text () {
    this.__warnIfDestroyed();

    return this.element.textContent.trim()
  };

  /**
   * Simulates event triggering
   */
  Wrapper.prototype.__simulateTrigger = function __simulateTrigger (type, options) {
      var this$1 = this;

    var regularEventTrigger = function (type, options) {
      var event = createDOMEvent(type, options);
      return this$1.element.dispatchEvent(event)
    };

    var focusEventTrigger = function (type, options) {
      if (this$1.element instanceof HTMLElement) {
        return this$1.element.focus()
      }

      regularEventTrigger(type, options);
    };

    var triggerProcedureMap = {
      focus: focusEventTrigger,
      __default: regularEventTrigger
    };

    var triggerFn = triggerProcedureMap[type] || triggerProcedureMap.__default;

    return triggerFn(type, options)
  };

  /**
   * Dispatches a DOM event on wrapper
   */
  Wrapper.prototype.trigger = function trigger (type, options) {
      if ( options === void 0 ) options = {};

    this.__warnIfDestroyed();

    if (typeof type !== 'string') {
      throwError('wrapper.trigger() must be passed a string');
    }

    if (options.target) {
      throwError(
        "you cannot set the target value of an event. See the notes section " +
          "of the docs for more details—" +
          "https://vue-test-utils.vuejs.org/api/wrapper/trigger.html"
      );
    }

    /**
     * Avoids firing events on specific disabled elements
     * See more: https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/disabled
     */

    var supportedTags = [
      'BUTTON',
      'COMMAND',
      'FIELDSET',
      'KEYGEN',
      'OPTGROUP',
      'OPTION',
      'SELECT',
      'TEXTAREA',
      'INPUT'
    ];
    var tagName = this.element.tagName;

    if (this.attributes().disabled && supportedTags.indexOf(tagName) > -1) {
      return nextTick()
    }

    this.__simulateTrigger(type, options);
    return nextTick()
  };

  // 

  var VueWrapper = /*@__PURE__*/(function (Wrapper) {
    function VueWrapper(vm, options) {
      var this$1 = this;

      Wrapper.call(this, vm._vnode, options, true);
      // $FlowIgnore : issue with defineProperty
      Object.defineProperty(this, 'rootNode', {
        get: function () { return vm.$vnode || { child: this$1.vm }; },
        set: function () { return throwError('wrapper.vnode is read-only'); }
      });
      // $FlowIgnore : issue with defineProperty
      Object.defineProperty(this, 'vnode', {
        get: function () { return vm._vnode; },
        set: function () { return throwError('wrapper.vnode is read-only'); }
      });
      // $FlowIgnore
      Object.defineProperty(this, 'element', {
        get: function () { return vm.$el; },
        set: function () { return throwError('wrapper.element is read-only'); }
      });
      // $FlowIgnore
      Object.defineProperty(this, 'vm', {
        get: function () { return vm; },
        set: function () { return throwError('wrapper.vm is read-only'); }
      });
      this.isFunctionalComponent = vm.$options._isFunctionalContainer;
      this._emitted = vm.__emitted;
      this._emittedByOrder = vm.__emittedByOrder;
    }

    if ( Wrapper ) VueWrapper.__proto__ = Wrapper;
    VueWrapper.prototype = Object.create( Wrapper && Wrapper.prototype );
    VueWrapper.prototype.constructor = VueWrapper;

    return VueWrapper;
  }(Wrapper));

  // 

  var isEnabled = false;
  var wrapperInstances = [];

  function resetAutoDestroyState() {
    isEnabled = false;
    wrapperInstances.length = 0;
  }

  function enableAutoDestroy(hook) {
    if (isEnabled) {
      throwError('enableAutoDestroy cannot be called more than once');
    }

    isEnabled = true;

    hook(function () {
      wrapperInstances.forEach(function (wrapper) {
        // skip child wrappers created by wrapper.find()
        if (wrapper.vm || wrapper.isFunctionalComponent) {
          wrapper.destroy();
        }
      });

      wrapperInstances.length = 0;
    });
  }

  function trackInstance(wrapper) {
    if (!isEnabled) { return }

    wrapperInstances.push(wrapper);
  }

  // 

  function createWrapper(
    node,
    options
  ) {
    if ( options === void 0 ) options = {};

    var componentInstance = node.child;
    if (componentInstance) {
      var wrapper$1 = new VueWrapper(componentInstance, options);
      trackInstance(wrapper$1);
      return wrapper$1
    }
    var wrapper =
      node instanceof Vue__default['default']
        ? new VueWrapper(node, options)
        : new Wrapper(node, options);
    trackInstance(wrapper);
    return wrapper
  }

  /**
   * Removes all key-value entries from the list cache.
   *
   * @private
   * @name clear
   * @memberOf ListCache
   */
  function listCacheClear() {
    this.__data__ = [];
    this.size = 0;
  }

  var _listCacheClear = listCacheClear;

  /**
   * Performs a
   * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
   * comparison between two values to determine if they are equivalent.
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to compare.
   * @param {*} other The other value to compare.
   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
   * @example
   *
   * var object = { 'a': 1 };
   * var other = { 'a': 1 };
   *
   * _.eq(object, object);
   * // => true
   *
   * _.eq(object, other);
   * // => false
   *
   * _.eq('a', 'a');
   * // => true
   *
   * _.eq('a', Object('a'));
   * // => false
   *
   * _.eq(NaN, NaN);
   * // => true
   */
  function eq(value, other) {
    return value === other || (value !== value && other !== other);
  }

  var eq_1 = eq;

  /**
   * Gets the index at which the `key` is found in `array` of key-value pairs.
   *
   * @private
   * @param {Array} array The array to inspect.
   * @param {*} key The key to search for.
   * @returns {number} Returns the index of the matched value, else `-1`.
   */
  function assocIndexOf(array, key) {
    var length = array.length;
    while (length--) {
      if (eq_1(array[length][0], key)) {
        return length;
      }
    }
    return -1;
  }

  var _assocIndexOf = assocIndexOf;

  /** Used for built-in method references. */
  var arrayProto = Array.prototype;

  /** Built-in value references. */
  var splice = arrayProto.splice;

  /**
   * Removes `key` and its value from the list cache.
   *
   * @private
   * @name delete
   * @memberOf ListCache
   * @param {string} key The key of the value to remove.
   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
   */
  function listCacheDelete(key) {
    var data = this.__data__,
        index = _assocIndexOf(data, key);

    if (index < 0) {
      return false;
    }
    var lastIndex = data.length - 1;
    if (index == lastIndex) {
      data.pop();
    } else {
      splice.call(data, index, 1);
    }
    --this.size;
    return true;
  }

  var _listCacheDelete = listCacheDelete;

  /**
   * Gets the list cache value for `key`.
   *
   * @private
   * @name get
   * @memberOf ListCache
   * @param {string} key The key of the value to get.
   * @returns {*} Returns the entry value.
   */
  function listCacheGet(key) {
    var data = this.__data__,
        index = _assocIndexOf(data, key);

    return index < 0 ? undefined : data[index][1];
  }

  var _listCacheGet = listCacheGet;

  /**
   * Checks if a list cache value for `key` exists.
   *
   * @private
   * @name has
   * @memberOf ListCache
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function listCacheHas(key) {
    return _assocIndexOf(this.__data__, key) > -1;
  }

  var _listCacheHas = listCacheHas;

  /**
   * Sets the list cache `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf ListCache
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the list cache instance.
   */
  function listCacheSet(key, value) {
    var data = this.__data__,
        index = _assocIndexOf(data, key);

    if (index < 0) {
      ++this.size;
      data.push([key, value]);
    } else {
      data[index][1] = value;
    }
    return this;
  }

  var _listCacheSet = listCacheSet;

  /**
   * Creates an list cache object.
   *
   * @private
   * @constructor
   * @param {Array} [entries] The key-value pairs to cache.
   */
  function ListCache(entries) {
    var index = -1,
        length = entries == null ? 0 : entries.length;

    this.clear();
    while (++index < length) {
      var entry = entries[index];
      this.set(entry[0], entry[1]);
    }
  }

  // Add methods to `ListCache`.
  ListCache.prototype.clear = _listCacheClear;
  ListCache.prototype['delete'] = _listCacheDelete;
  ListCache.prototype.get = _listCacheGet;
  ListCache.prototype.has = _listCacheHas;
  ListCache.prototype.set = _listCacheSet;

  var _ListCache = ListCache;

  /**
   * Removes all key-value entries from the stack.
   *
   * @private
   * @name clear
   * @memberOf Stack
   */
  function stackClear() {
    this.__data__ = new _ListCache;
    this.size = 0;
  }

  var _stackClear = stackClear;

  /**
   * Removes `key` and its value from the stack.
   *
   * @private
   * @name delete
   * @memberOf Stack
   * @param {string} key The key of the value to remove.
   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
   */
  function stackDelete(key) {
    var data = this.__data__,
        result = data['delete'](key);

    this.size = data.size;
    return result;
  }

  var _stackDelete = stackDelete;

  /**
   * Gets the stack value for `key`.
   *
   * @private
   * @name get
   * @memberOf Stack
   * @param {string} key The key of the value to get.
   * @returns {*} Returns the entry value.
   */
  function stackGet(key) {
    return this.__data__.get(key);
  }

  var _stackGet = stackGet;

  /**
   * Checks if a stack value for `key` exists.
   *
   * @private
   * @name has
   * @memberOf Stack
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function stackHas(key) {
    return this.__data__.has(key);
  }

  var _stackHas = stackHas;

  /** Detect free variable `global` from Node.js. */
  var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;

  var _freeGlobal = freeGlobal;

  /** Detect free variable `self`. */
  var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

  /** Used as a reference to the global object. */
  var root = _freeGlobal || freeSelf || Function('return this')();

  var _root = root;

  /** Built-in value references. */
  var Symbol = _root.Symbol;

  var _Symbol = Symbol;

  /** Used for built-in method references. */
  var objectProto = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$1 = objectProto.hasOwnProperty;

  /**
   * Used to resolve the
   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
   * of values.
   */
  var nativeObjectToString = objectProto.toString;

  /** Built-in value references. */
  var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;

  /**
   * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
   *
   * @private
   * @param {*} value The value to query.
   * @returns {string} Returns the raw `toStringTag`.
   */
  function getRawTag(value) {
    var isOwn = hasOwnProperty$1.call(value, symToStringTag),
        tag = value[symToStringTag];

    try {
      value[symToStringTag] = undefined;
      var unmasked = true;
    } catch (e) {}

    var result = nativeObjectToString.call(value);
    if (unmasked) {
      if (isOwn) {
        value[symToStringTag] = tag;
      } else {
        delete value[symToStringTag];
      }
    }
    return result;
  }

  var _getRawTag = getRawTag;

  /** Used for built-in method references. */
  var objectProto$1 = Object.prototype;

  /**
   * Used to resolve the
   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
   * of values.
   */
  var nativeObjectToString$1 = objectProto$1.toString;

  /**
   * Converts `value` to a string using `Object.prototype.toString`.
   *
   * @private
   * @param {*} value The value to convert.
   * @returns {string} Returns the converted string.
   */
  function objectToString(value) {
    return nativeObjectToString$1.call(value);
  }

  var _objectToString = objectToString;

  /** `Object#toString` result references. */
  var nullTag = '[object Null]',
      undefinedTag = '[object Undefined]';

  /** Built-in value references. */
  var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;

  /**
   * The base implementation of `getTag` without fallbacks for buggy environments.
   *
   * @private
   * @param {*} value The value to query.
   * @returns {string} Returns the `toStringTag`.
   */
  function baseGetTag(value) {
    if (value == null) {
      return value === undefined ? undefinedTag : nullTag;
    }
    return (symToStringTag$1 && symToStringTag$1 in Object(value))
      ? _getRawTag(value)
      : _objectToString(value);
  }

  var _baseGetTag = baseGetTag;

  /**
   * Checks if `value` is the
   * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
   * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an object, else `false`.
   * @example
   *
   * _.isObject({});
   * // => true
   *
   * _.isObject([1, 2, 3]);
   * // => true
   *
   * _.isObject(_.noop);
   * // => true
   *
   * _.isObject(null);
   * // => false
   */
  function isObject(value) {
    var type = typeof value;
    return value != null && (type == 'object' || type == 'function');
  }

  var isObject_1 = isObject;

  /** `Object#toString` result references. */
  var asyncTag = '[object AsyncFunction]',
      funcTag = '[object Function]',
      genTag = '[object GeneratorFunction]',
      proxyTag = '[object Proxy]';

  /**
   * Checks if `value` is classified as a `Function` object.
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a function, else `false`.
   * @example
   *
   * _.isFunction(_);
   * // => true
   *
   * _.isFunction(/abc/);
   * // => false
   */
  function isFunction(value) {
    if (!isObject_1(value)) {
      return false;
    }
    // The use of `Object#toString` avoids issues with the `typeof` operator
    // in Safari 9 which returns 'object' for typed arrays and other constructors.
    var tag = _baseGetTag(value);
    return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
  }

  var isFunction_1 = isFunction;

  /** Used to detect overreaching core-js shims. */
  var coreJsData = _root['__core-js_shared__'];

  var _coreJsData = coreJsData;

  /** Used to detect methods masquerading as native. */
  var maskSrcKey = (function() {
    var uid = /[^.]+$/.exec(_coreJsData && _coreJsData.keys && _coreJsData.keys.IE_PROTO || '');
    return uid ? ('Symbol(src)_1.' + uid) : '';
  }());

  /**
   * Checks if `func` has its source masked.
   *
   * @private
   * @param {Function} func The function to check.
   * @returns {boolean} Returns `true` if `func` is masked, else `false`.
   */
  function isMasked(func) {
    return !!maskSrcKey && (maskSrcKey in func);
  }

  var _isMasked = isMasked;

  /** Used for built-in method references. */
  var funcProto = Function.prototype;

  /** Used to resolve the decompiled source of functions. */
  var funcToString = funcProto.toString;

  /**
   * Converts `func` to its source code.
   *
   * @private
   * @param {Function} func The function to convert.
   * @returns {string} Returns the source code.
   */
  function toSource(func) {
    if (func != null) {
      try {
        return funcToString.call(func);
      } catch (e) {}
      try {
        return (func + '');
      } catch (e$1) {}
    }
    return '';
  }

  var _toSource = toSource;

  /**
   * Used to match `RegExp`
   * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
   */
  var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;

  /** Used to detect host constructors (Safari). */
  var reIsHostCtor = /^\[object .+?Constructor\]$/;

  /** Used for built-in method references. */
  var funcProto$1 = Function.prototype,
      objectProto$2 = Object.prototype;

  /** Used to resolve the decompiled source of functions. */
  var funcToString$1 = funcProto$1.toString;

  /** Used to check objects for own properties. */
  var hasOwnProperty$2 = objectProto$2.hasOwnProperty;

  /** Used to detect if a method is native. */
  var reIsNative = RegExp('^' +
    funcToString$1.call(hasOwnProperty$2).replace(reRegExpChar, '\\$&')
    .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
  );

  /**
   * The base implementation of `_.isNative` without bad shim checks.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a native function,
   *  else `false`.
   */
  function baseIsNative(value) {
    if (!isObject_1(value) || _isMasked(value)) {
      return false;
    }
    var pattern = isFunction_1(value) ? reIsNative : reIsHostCtor;
    return pattern.test(_toSource(value));
  }

  var _baseIsNative = baseIsNative;

  /**
   * Gets the value at `key` of `object`.
   *
   * @private
   * @param {Object} [object] The object to query.
   * @param {string} key The key of the property to get.
   * @returns {*} Returns the property value.
   */
  function getValue(object, key) {
    return object == null ? undefined : object[key];
  }

  var _getValue = getValue;

  /**
   * Gets the native function at `key` of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {string} key The key of the method to get.
   * @returns {*} Returns the function if it's native, else `undefined`.
   */
  function getNative(object, key) {
    var value = _getValue(object, key);
    return _baseIsNative(value) ? value : undefined;
  }

  var _getNative = getNative;

  /* Built-in method references that are verified to be native. */
  var Map = _getNative(_root, 'Map');

  var _Map = Map;

  /* Built-in method references that are verified to be native. */
  var nativeCreate = _getNative(Object, 'create');

  var _nativeCreate = nativeCreate;

  /**
   * Removes all key-value entries from the hash.
   *
   * @private
   * @name clear
   * @memberOf Hash
   */
  function hashClear() {
    this.__data__ = _nativeCreate ? _nativeCreate(null) : {};
    this.size = 0;
  }

  var _hashClear = hashClear;

  /**
   * Removes `key` and its value from the hash.
   *
   * @private
   * @name delete
   * @memberOf Hash
   * @param {Object} hash The hash to modify.
   * @param {string} key The key of the value to remove.
   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
   */
  function hashDelete(key) {
    var result = this.has(key) && delete this.__data__[key];
    this.size -= result ? 1 : 0;
    return result;
  }

  var _hashDelete = hashDelete;

  /** Used to stand-in for `undefined` hash values. */
  var HASH_UNDEFINED = '__lodash_hash_undefined__';

  /** Used for built-in method references. */
  var objectProto$3 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$3 = objectProto$3.hasOwnProperty;

  /**
   * Gets the hash value for `key`.
   *
   * @private
   * @name get
   * @memberOf Hash
   * @param {string} key The key of the value to get.
   * @returns {*} Returns the entry value.
   */
  function hashGet(key) {
    var data = this.__data__;
    if (_nativeCreate) {
      var result = data[key];
      return result === HASH_UNDEFINED ? undefined : result;
    }
    return hasOwnProperty$3.call(data, key) ? data[key] : undefined;
  }

  var _hashGet = hashGet;

  /** Used for built-in method references. */
  var objectProto$4 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$4 = objectProto$4.hasOwnProperty;

  /**
   * Checks if a hash value for `key` exists.
   *
   * @private
   * @name has
   * @memberOf Hash
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function hashHas(key) {
    var data = this.__data__;
    return _nativeCreate ? (data[key] !== undefined) : hasOwnProperty$4.call(data, key);
  }

  var _hashHas = hashHas;

  /** Used to stand-in for `undefined` hash values. */
  var HASH_UNDEFINED$1 = '__lodash_hash_undefined__';

  /**
   * Sets the hash `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf Hash
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the hash instance.
   */
  function hashSet(key, value) {
    var data = this.__data__;
    this.size += this.has(key) ? 0 : 1;
    data[key] = (_nativeCreate && value === undefined) ? HASH_UNDEFINED$1 : value;
    return this;
  }

  var _hashSet = hashSet;

  /**
   * Creates a hash object.
   *
   * @private
   * @constructor
   * @param {Array} [entries] The key-value pairs to cache.
   */
  function Hash(entries) {
    var index = -1,
        length = entries == null ? 0 : entries.length;

    this.clear();
    while (++index < length) {
      var entry = entries[index];
      this.set(entry[0], entry[1]);
    }
  }

  // Add methods to `Hash`.
  Hash.prototype.clear = _hashClear;
  Hash.prototype['delete'] = _hashDelete;
  Hash.prototype.get = _hashGet;
  Hash.prototype.has = _hashHas;
  Hash.prototype.set = _hashSet;

  var _Hash = Hash;

  /**
   * Removes all key-value entries from the map.
   *
   * @private
   * @name clear
   * @memberOf MapCache
   */
  function mapCacheClear() {
    this.size = 0;
    this.__data__ = {
      'hash': new _Hash,
      'map': new (_Map || _ListCache),
      'string': new _Hash
    };
  }

  var _mapCacheClear = mapCacheClear;

  /**
   * Checks if `value` is suitable for use as unique object key.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
   */
  function isKeyable(value) {
    var type = typeof value;
    return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
      ? (value !== '__proto__')
      : (value === null);
  }

  var _isKeyable = isKeyable;

  /**
   * Gets the data for `map`.
   *
   * @private
   * @param {Object} map The map to query.
   * @param {string} key The reference key.
   * @returns {*} Returns the map data.
   */
  function getMapData(map, key) {
    var data = map.__data__;
    return _isKeyable(key)
      ? data[typeof key == 'string' ? 'string' : 'hash']
      : data.map;
  }

  var _getMapData = getMapData;

  /**
   * Removes `key` and its value from the map.
   *
   * @private
   * @name delete
   * @memberOf MapCache
   * @param {string} key The key of the value to remove.
   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
   */
  function mapCacheDelete(key) {
    var result = _getMapData(this, key)['delete'](key);
    this.size -= result ? 1 : 0;
    return result;
  }

  var _mapCacheDelete = mapCacheDelete;

  /**
   * Gets the map value for `key`.
   *
   * @private
   * @name get
   * @memberOf MapCache
   * @param {string} key The key of the value to get.
   * @returns {*} Returns the entry value.
   */
  function mapCacheGet(key) {
    return _getMapData(this, key).get(key);
  }

  var _mapCacheGet = mapCacheGet;

  /**
   * Checks if a map value for `key` exists.
   *
   * @private
   * @name has
   * @memberOf MapCache
   * @param {string} key The key of the entry to check.
   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
   */
  function mapCacheHas(key) {
    return _getMapData(this, key).has(key);
  }

  var _mapCacheHas = mapCacheHas;

  /**
   * Sets the map `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf MapCache
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the map cache instance.
   */
  function mapCacheSet(key, value) {
    var data = _getMapData(this, key),
        size = data.size;

    data.set(key, value);
    this.size += data.size == size ? 0 : 1;
    return this;
  }

  var _mapCacheSet = mapCacheSet;

  /**
   * Creates a map cache object to store key-value pairs.
   *
   * @private
   * @constructor
   * @param {Array} [entries] The key-value pairs to cache.
   */
  function MapCache(entries) {
    var index = -1,
        length = entries == null ? 0 : entries.length;

    this.clear();
    while (++index < length) {
      var entry = entries[index];
      this.set(entry[0], entry[1]);
    }
  }

  // Add methods to `MapCache`.
  MapCache.prototype.clear = _mapCacheClear;
  MapCache.prototype['delete'] = _mapCacheDelete;
  MapCache.prototype.get = _mapCacheGet;
  MapCache.prototype.has = _mapCacheHas;
  MapCache.prototype.set = _mapCacheSet;

  var _MapCache = MapCache;

  /** Used as the size to enable large array optimizations. */
  var LARGE_ARRAY_SIZE = 200;

  /**
   * Sets the stack `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf Stack
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the stack cache instance.
   */
  function stackSet(key, value) {
    var data = this.__data__;
    if (data instanceof _ListCache) {
      var pairs = data.__data__;
      if (!_Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
        pairs.push([key, value]);
        this.size = ++data.size;
        return this;
      }
      data = this.__data__ = new _MapCache(pairs);
    }
    data.set(key, value);
    this.size = data.size;
    return this;
  }

  var _stackSet = stackSet;

  /**
   * Creates a stack cache object to store key-value pairs.
   *
   * @private
   * @constructor
   * @param {Array} [entries] The key-value pairs to cache.
   */
  function Stack(entries) {
    var data = this.__data__ = new _ListCache(entries);
    this.size = data.size;
  }

  // Add methods to `Stack`.
  Stack.prototype.clear = _stackClear;
  Stack.prototype['delete'] = _stackDelete;
  Stack.prototype.get = _stackGet;
  Stack.prototype.has = _stackHas;
  Stack.prototype.set = _stackSet;

  var _Stack = Stack;

  /**
   * A specialized version of `_.forEach` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns `array`.
   */
  function arrayEach(array, iteratee) {
    var index = -1,
        length = array == null ? 0 : array.length;

    while (++index < length) {
      if (iteratee(array[index], index, array) === false) {
        break;
      }
    }
    return array;
  }

  var _arrayEach = arrayEach;

  var defineProperty = (function() {
    try {
      var func = _getNative(Object, 'defineProperty');
      func({}, '', {});
      return func;
    } catch (e) {}
  }());

  var _defineProperty = defineProperty;

  /**
   * The base implementation of `assignValue` and `assignMergeValue` without
   * value checks.
   *
   * @private
   * @param {Object} object The object to modify.
   * @param {string} key The key of the property to assign.
   * @param {*} value The value to assign.
   */
  function baseAssignValue(object, key, value) {
    if (key == '__proto__' && _defineProperty) {
      _defineProperty(object, key, {
        'configurable': true,
        'enumerable': true,
        'value': value,
        'writable': true
      });
    } else {
      object[key] = value;
    }
  }

  var _baseAssignValue = baseAssignValue;

  /** Used for built-in method references. */
  var objectProto$5 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$5 = objectProto$5.hasOwnProperty;

  /**
   * Assigns `value` to `key` of `object` if the existing value is not equivalent
   * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
   * for equality comparisons.
   *
   * @private
   * @param {Object} object The object to modify.
   * @param {string} key The key of the property to assign.
   * @param {*} value The value to assign.
   */
  function assignValue(object, key, value) {
    var objValue = object[key];
    if (!(hasOwnProperty$5.call(object, key) && eq_1(objValue, value)) ||
        (value === undefined && !(key in object))) {
      _baseAssignValue(object, key, value);
    }
  }

  var _assignValue = assignValue;

  /**
   * Copies properties of `source` to `object`.
   *
   * @private
   * @param {Object} source The object to copy properties from.
   * @param {Array} props The property identifiers to copy.
   * @param {Object} [object={}] The object to copy properties to.
   * @param {Function} [customizer] The function to customize copied values.
   * @returns {Object} Returns `object`.
   */
  function copyObject(source, props, object, customizer) {
    var isNew = !object;
    object || (object = {});

    var index = -1,
        length = props.length;

    while (++index < length) {
      var key = props[index];

      var newValue = customizer
        ? customizer(object[key], source[key], key, object, source)
        : undefined;

      if (newValue === undefined) {
        newValue = source[key];
      }
      if (isNew) {
        _baseAssignValue(object, key, newValue);
      } else {
        _assignValue(object, key, newValue);
      }
    }
    return object;
  }

  var _copyObject = copyObject;

  /**
   * The base implementation of `_.times` without support for iteratee shorthands
   * or max array length checks.
   *
   * @private
   * @param {number} n The number of times to invoke `iteratee`.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array} Returns the array of results.
   */
  function baseTimes(n, iteratee) {
    var index = -1,
        result = Array(n);

    while (++index < n) {
      result[index] = iteratee(index);
    }
    return result;
  }

  var _baseTimes = baseTimes;

  /**
   * Checks if `value` is object-like. A value is object-like if it's not `null`
   * and has a `typeof` result of "object".
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
   * @example
   *
   * _.isObjectLike({});
   * // => true
   *
   * _.isObjectLike([1, 2, 3]);
   * // => true
   *
   * _.isObjectLike(_.noop);
   * // => false
   *
   * _.isObjectLike(null);
   * // => false
   */
  function isObjectLike(value) {
    return value != null && typeof value == 'object';
  }

  var isObjectLike_1 = isObjectLike;

  /** `Object#toString` result references. */
  var argsTag = '[object Arguments]';

  /**
   * The base implementation of `_.isArguments`.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an `arguments` object,
   */
  function baseIsArguments(value) {
    return isObjectLike_1(value) && _baseGetTag(value) == argsTag;
  }

  var _baseIsArguments = baseIsArguments;

  /** Used for built-in method references. */
  var objectProto$6 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$6 = objectProto$6.hasOwnProperty;

  /** Built-in value references. */
  var propertyIsEnumerable = objectProto$6.propertyIsEnumerable;

  /**
   * Checks if `value` is likely an `arguments` object.
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an `arguments` object,
   *  else `false`.
   * @example
   *
   * _.isArguments(function() { return arguments; }());
   * // => true
   *
   * _.isArguments([1, 2, 3]);
   * // => false
   */
  var isArguments = _baseIsArguments(function() { return arguments; }()) ? _baseIsArguments : function(value) {
    return isObjectLike_1(value) && hasOwnProperty$6.call(value, 'callee') &&
      !propertyIsEnumerable.call(value, 'callee');
  };

  var isArguments_1 = isArguments;

  /**
   * Checks if `value` is classified as an `Array` object.
   *
   * @static
   * @memberOf _
   * @since 0.1.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is an array, else `false`.
   * @example
   *
   * _.isArray([1, 2, 3]);
   * // => true
   *
   * _.isArray(document.body.children);
   * // => false
   *
   * _.isArray('abc');
   * // => false
   *
   * _.isArray(_.noop);
   * // => false
   */
  var isArray = Array.isArray;

  var isArray_1 = isArray;

  /**
   * This method returns `false`.
   *
   * @static
   * @memberOf _
   * @since 4.13.0
   * @category Util
   * @returns {boolean} Returns `false`.
   * @example
   *
   * _.times(2, _.stubFalse);
   * // => [false, false]
   */
  function stubFalse() {
    return false;
  }

  var stubFalse_1 = stubFalse;

  var isBuffer_1$1 = createCommonjsModule(function (module, exports) {
  /** Detect free variable `exports`. */
  var freeExports =  exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports;

  /** Built-in value references. */
  var Buffer = moduleExports ? _root.Buffer : undefined;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;

  /**
   * Checks if `value` is a buffer.
   *
   * @static
   * @memberOf _
   * @since 4.3.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
   * @example
   *
   * _.isBuffer(new Buffer(2));
   * // => true
   *
   * _.isBuffer(new Uint8Array(2));
   * // => false
   */
  var isBuffer = nativeIsBuffer || stubFalse_1;

  module.exports = isBuffer;
  });

  /** Used as references for various `Number` constants. */
  var MAX_SAFE_INTEGER = 9007199254740991;

  /** Used to detect unsigned integer values. */
  var reIsUint = /^(?:0|[1-9]\d*)$/;

  /**
   * Checks if `value` is a valid array-like index.
   *
   * @private
   * @param {*} value The value to check.
   * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
   * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
   */
  function isIndex(value, length) {
    var type = typeof value;
    length = length == null ? MAX_SAFE_INTEGER : length;

    return !!length &&
      (type == 'number' ||
        (type != 'symbol' && reIsUint.test(value))) &&
          (value > -1 && value % 1 == 0 && value < length);
  }

  var _isIndex = isIndex;

  /** Used as references for various `Number` constants. */
  var MAX_SAFE_INTEGER$1 = 9007199254740991;

  /**
   * Checks if `value` is a valid array-like length.
   *
   * **Note:** This method is loosely based on
   * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
   * @example
   *
   * _.isLength(3);
   * // => true
   *
   * _.isLength(Number.MIN_VALUE);
   * // => false
   *
   * _.isLength(Infinity);
   * // => false
   *
   * _.isLength('3');
   * // => false
   */
  function isLength(value) {
    return typeof value == 'number' &&
      value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER$1;
  }

  var isLength_1 = isLength;

  /** `Object#toString` result references. */
  var argsTag$1 = '[object Arguments]',
      arrayTag = '[object Array]',
      boolTag = '[object Boolean]',
      dateTag = '[object Date]',
      errorTag = '[object Error]',
      funcTag$1 = '[object Function]',
      mapTag = '[object Map]',
      numberTag = '[object Number]',
      objectTag = '[object Object]',
      regexpTag = '[object RegExp]',
      setTag = '[object Set]',
      stringTag = '[object String]',
      weakMapTag = '[object WeakMap]';

  var arrayBufferTag = '[object ArrayBuffer]',
      dataViewTag = '[object DataView]',
      float32Tag = '[object Float32Array]',
      float64Tag = '[object Float64Array]',
      int8Tag = '[object Int8Array]',
      int16Tag = '[object Int16Array]',
      int32Tag = '[object Int32Array]',
      uint8Tag = '[object Uint8Array]',
      uint8ClampedTag = '[object Uint8ClampedArray]',
      uint16Tag = '[object Uint16Array]',
      uint32Tag = '[object Uint32Array]';

  /** Used to identify `toStringTag` values of typed arrays. */
  var typedArrayTags = {};
  typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
  typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
  typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
  typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
  typedArrayTags[uint32Tag] = true;
  typedArrayTags[argsTag$1] = typedArrayTags[arrayTag] =
  typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
  typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
  typedArrayTags[errorTag] = typedArrayTags[funcTag$1] =
  typedArrayTags[mapTag] = typedArrayTags[numberTag] =
  typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
  typedArrayTags[setTag] = typedArrayTags[stringTag] =
  typedArrayTags[weakMapTag] = false;

  /**
   * The base implementation of `_.isTypedArray` without Node.js optimizations.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
   */
  function baseIsTypedArray(value) {
    return isObjectLike_1(value) &&
      isLength_1(value.length) && !!typedArrayTags[_baseGetTag(value)];
  }

  var _baseIsTypedArray = baseIsTypedArray;

  /**
   * The base implementation of `_.unary` without support for storing metadata.
   *
   * @private
   * @param {Function} func The function to cap arguments for.
   * @returns {Function} Returns the new capped function.
   */
  function baseUnary(func) {
    return function(value) {
      return func(value);
    };
  }

  var _baseUnary = baseUnary;

  var _nodeUtil = createCommonjsModule(function (module, exports) {
  /** Detect free variable `exports`. */
  var freeExports =  exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports;

  /** Detect free variable `process` from Node.js. */
  var freeProcess = moduleExports && _freeGlobal.process;

  /** Used to access faster Node.js helpers. */
  var nodeUtil = (function() {
    try {
      // Use `util.types` for Node.js 10+.
      var types = freeModule && freeModule.require && freeModule.require('util').types;

      if (types) {
        return types;
      }

      // Legacy `process.binding('util')` for Node.js < 10.
      return freeProcess && freeProcess.binding && freeProcess.binding('util');
    } catch (e) {}
  }());

  module.exports = nodeUtil;
  });

  /* Node.js helper references. */
  var nodeIsTypedArray = _nodeUtil && _nodeUtil.isTypedArray;

  /**
   * Checks if `value` is classified as a typed array.
   *
   * @static
   * @memberOf _
   * @since 3.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
   * @example
   *
   * _.isTypedArray(new Uint8Array);
   * // => true
   *
   * _.isTypedArray([]);
   * // => false
   */
  var isTypedArray = nodeIsTypedArray ? _baseUnary(nodeIsTypedArray) : _baseIsTypedArray;

  var isTypedArray_1 = isTypedArray;

  /** Used for built-in method references. */
  var objectProto$7 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$7 = objectProto$7.hasOwnProperty;

  /**
   * Creates an array of the enumerable property names of the array-like `value`.
   *
   * @private
   * @param {*} value The value to query.
   * @param {boolean} inherited Specify returning inherited property names.
   * @returns {Array} Returns the array of property names.
   */
  function arrayLikeKeys(value, inherited) {
    var isArr = isArray_1(value),
        isArg = !isArr && isArguments_1(value),
        isBuff = !isArr && !isArg && isBuffer_1$1(value),
        isType = !isArr && !isArg && !isBuff && isTypedArray_1(value),
        skipIndexes = isArr || isArg || isBuff || isType,
        result = skipIndexes ? _baseTimes(value.length, String) : [],
        length = result.length;

    for (var key in value) {
      if ((inherited || hasOwnProperty$7.call(value, key)) &&
          !(skipIndexes && (
             // Safari 9 has enumerable `arguments.length` in strict mode.
             key == 'length' ||
             // Node.js 0.10 has enumerable non-index properties on buffers.
             (isBuff && (key == 'offset' || key == 'parent')) ||
             // PhantomJS 2 has enumerable non-index properties on typed arrays.
             (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
             // Skip index properties.
             _isIndex(key, length)
          ))) {
        result.push(key);
      }
    }
    return result;
  }

  var _arrayLikeKeys = arrayLikeKeys;

  /** Used for built-in method references. */
  var objectProto$8 = Object.prototype;

  /**
   * Checks if `value` is likely a prototype object.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
   */
  function isPrototype(value) {
    var Ctor = value && value.constructor,
        proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$8;

    return value === proto;
  }

  var _isPrototype = isPrototype;

  /**
   * Creates a unary function that invokes `func` with its argument transformed.
   *
   * @private
   * @param {Function} func The function to wrap.
   * @param {Function} transform The argument transform.
   * @returns {Function} Returns the new function.
   */
  function overArg(func, transform) {
    return function(arg) {
      return func(transform(arg));
    };
  }

  var _overArg = overArg;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeKeys = _overArg(Object.keys, Object);

  var _nativeKeys = nativeKeys;

  /** Used for built-in method references. */
  var objectProto$9 = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$8 = objectProto$9.hasOwnProperty;

  /**
   * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   */
  function baseKeys(object) {
    if (!_isPrototype(object)) {
      return _nativeKeys(object);
    }
    var result = [];
    for (var key in Object(object)) {
      if (hasOwnProperty$8.call(object, key) && key != 'constructor') {
        result.push(key);
      }
    }
    return result;
  }

  var _baseKeys = baseKeys;

  /**
   * Checks if `value` is array-like. A value is considered array-like if it's
   * not a function and has a `value.length` that's an integer greater than or
   * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
   *
   * @static
   * @memberOf _
   * @since 4.0.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
   * @example
   *
   * _.isArrayLike([1, 2, 3]);
   * // => true
   *
   * _.isArrayLike(document.body.children);
   * // => true
   *
   * _.isArrayLike('abc');
   * // => true
   *
   * _.isArrayLike(_.noop);
   * // => false
   */
  function isArrayLike(value) {
    return value != null && isLength_1(value.length) && !isFunction_1(value);
  }

  var isArrayLike_1 = isArrayLike;

  /**
   * Creates an array of the own enumerable property names of `object`.
   *
   * **Note:** Non-object values are coerced to objects. See the
   * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
   * for more details.
   *
   * @static
   * @since 0.1.0
   * @memberOf _
   * @category Object
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   * @example
   *
   * function Foo() {
   *   this.a = 1;
   *   this.b = 2;
   * }
   *
   * Foo.prototype.c = 3;
   *
   * _.keys(new Foo);
   * // => ['a', 'b'] (iteration order is not guaranteed)
   *
   * _.keys('hi');
   * // => ['0', '1']
   */
  function keys$1(object) {
    return isArrayLike_1(object) ? _arrayLikeKeys(object) : _baseKeys(object);
  }

  var keys_1 = keys$1;

  /**
   * The base implementation of `_.assign` without support for multiple sources
   * or `customizer` functions.
   *
   * @private
   * @param {Object} object The destination object.
   * @param {Object} source The source object.
   * @returns {Object} Returns `object`.
   */
  function baseAssign(object, source) {
    return object && _copyObject(source, keys_1(source), object);
  }

  var _baseAssign = baseAssign;

  /**
   * This function is like
   * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
   * except that it includes inherited enumerable properties.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   */
  function nativeKeysIn(object) {
    var result = [];
    if (object != null) {
      for (var key in Object(object)) {
        result.push(key);
      }
    }
    return result;
  }

  var _nativeKeysIn = nativeKeysIn;

  /** Used for built-in method references. */
  var objectProto$a = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$9 = objectProto$a.hasOwnProperty;

  /**
   * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   */
  function baseKeysIn(object) {
    if (!isObject_1(object)) {
      return _nativeKeysIn(object);
    }
    var isProto = _isPrototype(object),
        result = [];

    for (var key in object) {
      if (!(key == 'constructor' && (isProto || !hasOwnProperty$9.call(object, key)))) {
        result.push(key);
      }
    }
    return result;
  }

  var _baseKeysIn = baseKeysIn;

  /**
   * Creates an array of the own and inherited enumerable property names of `object`.
   *
   * **Note:** Non-object values are coerced to objects.
   *
   * @static
   * @memberOf _
   * @since 3.0.0
   * @category Object
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   * @example
   *
   * function Foo() {
   *   this.a = 1;
   *   this.b = 2;
   * }
   *
   * Foo.prototype.c = 3;
   *
   * _.keysIn(new Foo);
   * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
   */
  function keysIn(object) {
    return isArrayLike_1(object) ? _arrayLikeKeys(object, true) : _baseKeysIn(object);
  }

  var keysIn_1 = keysIn;

  /**
   * The base implementation of `_.assignIn` without support for multiple sources
   * or `customizer` functions.
   *
   * @private
   * @param {Object} object The destination object.
   * @param {Object} source The source object.
   * @returns {Object} Returns `object`.
   */
  function baseAssignIn(object, source) {
    return object && _copyObject(source, keysIn_1(source), object);
  }

  var _baseAssignIn = baseAssignIn;

  var _cloneBuffer = createCommonjsModule(function (module, exports) {
  /** Detect free variable `exports`. */
  var freeExports =  exports && !exports.nodeType && exports;

  /** Detect free variable `module`. */
  var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports`. */
  var moduleExports = freeModule && freeModule.exports === freeExports;

  /** Built-in value references. */
  var Buffer = moduleExports ? _root.Buffer : undefined,
      allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined;

  /**
   * Creates a clone of  `buffer`.
   *
   * @private
   * @param {Buffer} buffer The buffer to clone.
   * @param {boolean} [isDeep] Specify a deep clone.
   * @returns {Buffer} Returns the cloned buffer.
   */
  function cloneBuffer(buffer, isDeep) {
    if (isDeep) {
      return buffer.slice();
    }
    var length = buffer.length,
        result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);

    buffer.copy(result);
    return result;
  }

  module.exports = cloneBuffer;
  });

  /**
   * Copies the values of `source` to `array`.
   *
   * @private
   * @param {Array} source The array to copy values from.
   * @param {Array} [array=[]] The array to copy values to.
   * @returns {Array} Returns `array`.
   */
  function copyArray(source, array) {
    var index = -1,
        length = source.length;

    array || (array = Array(length));
    while (++index < length) {
      array[index] = source[index];
    }
    return array;
  }

  var _copyArray = copyArray;

  /**
   * A specialized version of `_.filter` for arrays without support for
   * iteratee shorthands.
   *
   * @private
   * @param {Array} [array] The array to iterate over.
   * @param {Function} predicate The function invoked per iteration.
   * @returns {Array} Returns the new filtered array.
   */
  function arrayFilter(array, predicate) {
    var index = -1,
        length = array == null ? 0 : array.length,
        resIndex = 0,
        result = [];

    while (++index < length) {
      var value = array[index];
      if (predicate(value, index, array)) {
        result[resIndex++] = value;
      }
    }
    return result;
  }

  var _arrayFilter = arrayFilter;

  /**
   * This method returns a new empty array.
   *
   * @static
   * @memberOf _
   * @since 4.13.0
   * @category Util
   * @returns {Array} Returns the new empty array.
   * @example
   *
   * var arrays = _.times(2, _.stubArray);
   *
   * console.log(arrays);
   * // => [[], []]
   *
   * console.log(arrays[0] === arrays[1]);
   * // => false
   */
  function stubArray() {
    return [];
  }

  var stubArray_1 = stubArray;

  /** Used for built-in method references. */
  var objectProto$b = Object.prototype;

  /** Built-in value references. */
  var propertyIsEnumerable$1 = objectProto$b.propertyIsEnumerable;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeGetSymbols = Object.getOwnPropertySymbols;

  /**
   * Creates an array of the own enumerable symbols of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of symbols.
   */
  var getSymbols = !nativeGetSymbols ? stubArray_1 : function(object) {
    if (object == null) {
      return [];
    }
    object = Object(object);
    return _arrayFilter(nativeGetSymbols(object), function(symbol) {
      return propertyIsEnumerable$1.call(object, symbol);
    });
  };

  var _getSymbols = getSymbols;

  /**
   * Copies own symbols of `source` to `object`.
   *
   * @private
   * @param {Object} source The object to copy symbols from.
   * @param {Object} [object={}] The object to copy symbols to.
   * @returns {Object} Returns `object`.
   */
  function copySymbols(source, object) {
    return _copyObject(source, _getSymbols(source), object);
  }

  var _copySymbols = copySymbols;

  /**
   * Appends the elements of `values` to `array`.
   *
   * @private
   * @param {Array} array The array to modify.
   * @param {Array} values The values to append.
   * @returns {Array} Returns `array`.
   */
  function arrayPush(array, values) {
    var index = -1,
        length = values.length,
        offset = array.length;

    while (++index < length) {
      array[offset + index] = values[index];
    }
    return array;
  }

  var _arrayPush = arrayPush;

  /** Built-in value references. */
  var getPrototype = _overArg(Object.getPrototypeOf, Object);

  var _getPrototype = getPrototype;

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeGetSymbols$1 = Object.getOwnPropertySymbols;

  /**
   * Creates an array of the own and inherited enumerable symbols of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of symbols.
   */
  var getSymbolsIn = !nativeGetSymbols$1 ? stubArray_1 : function(object) {
    var result = [];
    while (object) {
      _arrayPush(result, _getSymbols(object));
      object = _getPrototype(object);
    }
    return result;
  };

  var _getSymbolsIn = getSymbolsIn;

  /**
   * Copies own and inherited symbols of `source` to `object`.
   *
   * @private
   * @param {Object} source The object to copy symbols from.
   * @param {Object} [object={}] The object to copy symbols to.
   * @returns {Object} Returns `object`.
   */
  function copySymbolsIn(source, object) {
    return _copyObject(source, _getSymbolsIn(source), object);
  }

  var _copySymbolsIn = copySymbolsIn;

  /**
   * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
   * `keysFunc` and `symbolsFunc` to get the enumerable property names and
   * symbols of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {Function} keysFunc The function to get the keys of `object`.
   * @param {Function} symbolsFunc The function to get the symbols of `object`.
   * @returns {Array} Returns the array of property names and symbols.
   */
  function baseGetAllKeys(object, keysFunc, symbolsFunc) {
    var result = keysFunc(object);
    return isArray_1(object) ? result : _arrayPush(result, symbolsFunc(object));
  }

  var _baseGetAllKeys = baseGetAllKeys;

  /**
   * Creates an array of own enumerable property names and symbols of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names and symbols.
   */
  function getAllKeys(object) {
    return _baseGetAllKeys(object, keys_1, _getSymbols);
  }

  var _getAllKeys = getAllKeys;

  /**
   * Creates an array of own and inherited enumerable property names and
   * symbols of `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names and symbols.
   */
  function getAllKeysIn(object) {
    return _baseGetAllKeys(object, keysIn_1, _getSymbolsIn);
  }

  var _getAllKeysIn = getAllKeysIn;

  /* Built-in method references that are verified to be native. */
  var DataView = _getNative(_root, 'DataView');

  var _DataView = DataView;

  /* Built-in method references that are verified to be native. */
  var Promise$1 = _getNative(_root, 'Promise');

  var _Promise = Promise$1;

  /* Built-in method references that are verified to be native. */
  var Set$1 = _getNative(_root, 'Set');

  var _Set = Set$1;

  /* Built-in method references that are verified to be native. */
  var WeakMap = _getNative(_root, 'WeakMap');

  var _WeakMap = WeakMap;

  /** `Object#toString` result references. */
  var mapTag$1 = '[object Map]',
      objectTag$1 = '[object Object]',
      promiseTag = '[object Promise]',
      setTag$1 = '[object Set]',
      weakMapTag$1 = '[object WeakMap]';

  var dataViewTag$1 = '[object DataView]';

  /** Used to detect maps, sets, and weakmaps. */
  var dataViewCtorString = _toSource(_DataView),
      mapCtorString = _toSource(_Map),
      promiseCtorString = _toSource(_Promise),
      setCtorString = _toSource(_Set),
      weakMapCtorString = _toSource(_WeakMap);

  /**
   * Gets the `toStringTag` of `value`.
   *
   * @private
   * @param {*} value The value to query.
   * @returns {string} Returns the `toStringTag`.
   */
  var getTag = _baseGetTag;

  // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
  if ((_DataView && getTag(new _DataView(new ArrayBuffer(1))) != dataViewTag$1) ||
      (_Map && getTag(new _Map) != mapTag$1) ||
      (_Promise && getTag(_Promise.resolve()) != promiseTag) ||
      (_Set && getTag(new _Set) != setTag$1) ||
      (_WeakMap && getTag(new _WeakMap) != weakMapTag$1)) {
    getTag = function(value) {
      var result = _baseGetTag(value),
          Ctor = result == objectTag$1 ? value.constructor : undefined,
          ctorString = Ctor ? _toSource(Ctor) : '';

      if (ctorString) {
        switch (ctorString) {
          case dataViewCtorString: return dataViewTag$1;
          case mapCtorString: return mapTag$1;
          case promiseCtorString: return promiseTag;
          case setCtorString: return setTag$1;
          case weakMapCtorString: return weakMapTag$1;
        }
      }
      return result;
    };
  }

  var _getTag = getTag;

  /** Used for built-in method references. */
  var objectProto$c = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty$a = objectProto$c.hasOwnProperty;

  /**
   * Initializes an array clone.
   *
   * @private
   * @param {Array} array The array to clone.
   * @returns {Array} Returns the initialized clone.
   */
  function initCloneArray(array) {
    var length = array.length,
        result = new array.constructor(length);

    // Add properties assigned by `RegExp#exec`.
    if (length && typeof array[0] == 'string' && hasOwnProperty$a.call(array, 'index')) {
      result.index = array.index;
      result.input = array.input;
    }
    return result;
  }

  var _initCloneArray = initCloneArray;

  /** Built-in value references. */
  var Uint8Array = _root.Uint8Array;

  var _Uint8Array = Uint8Array;

  /**
   * Creates a clone of `arrayBuffer`.
   *
   * @private
   * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
   * @returns {ArrayBuffer} Returns the cloned array buffer.
   */
  function cloneArrayBuffer(arrayBuffer) {
    var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
    new _Uint8Array(result).set(new _Uint8Array(arrayBuffer));
    return result;
  }

  var _cloneArrayBuffer = cloneArrayBuffer;

  /**
   * Creates a clone of `dataView`.
   *
   * @private
   * @param {Object} dataView The data view to clone.
   * @param {boolean} [isDeep] Specify a deep clone.
   * @returns {Object} Returns the cloned data view.
   */
  function cloneDataView(dataView, isDeep) {
    var buffer = isDeep ? _cloneArrayBuffer(dataView.buffer) : dataView.buffer;
    return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
  }

  var _cloneDataView = cloneDataView;

  /** Used to match `RegExp` flags from their coerced string values. */
  var reFlags = /\w*$/;

  /**
   * Creates a clone of `regexp`.
   *
   * @private
   * @param {Object} regexp The regexp to clone.
   * @returns {Object} Returns the cloned regexp.
   */
  function cloneRegExp(regexp) {
    var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
    result.lastIndex = regexp.lastIndex;
    return result;
  }

  var _cloneRegExp = cloneRegExp;

  /** Used to convert symbols to primitives and strings. */
  var symbolProto = _Symbol ? _Symbol.prototype : undefined,
      symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;

  /**
   * Creates a clone of the `symbol` object.
   *
   * @private
   * @param {Object} symbol The symbol object to clone.
   * @returns {Object} Returns the cloned symbol object.
   */
  function cloneSymbol(symbol) {
    return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
  }

  var _cloneSymbol = cloneSymbol;

  /**
   * Creates a clone of `typedArray`.
   *
   * @private
   * @param {Object} typedArray The typed array to clone.
   * @param {boolean} [isDeep] Specify a deep clone.
   * @returns {Object} Returns the cloned typed array.
   */
  function cloneTypedArray(typedArray, isDeep) {
    var buffer = isDeep ? _cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
    return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
  }

  var _cloneTypedArray = cloneTypedArray;

  /** `Object#toString` result references. */
  var boolTag$1 = '[object Boolean]',
      dateTag$1 = '[object Date]',
      mapTag$2 = '[object Map]',
      numberTag$1 = '[object Number]',
      regexpTag$1 = '[object RegExp]',
      setTag$2 = '[object Set]',
      stringTag$1 = '[object String]',
      symbolTag = '[object Symbol]';

  var arrayBufferTag$1 = '[object ArrayBuffer]',
      dataViewTag$2 = '[object DataView]',
      float32Tag$1 = '[object Float32Array]',
      float64Tag$1 = '[object Float64Array]',
      int8Tag$1 = '[object Int8Array]',
      int16Tag$1 = '[object Int16Array]',
      int32Tag$1 = '[object Int32Array]',
      uint8Tag$1 = '[object Uint8Array]',
      uint8ClampedTag$1 = '[object Uint8ClampedArray]',
      uint16Tag$1 = '[object Uint16Array]',
      uint32Tag$1 = '[object Uint32Array]';

  /**
   * Initializes an object clone based on its `toStringTag`.
   *
   * **Note:** This function only supports cloning values with tags of
   * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
   *
   * @private
   * @param {Object} object The object to clone.
   * @param {string} tag The `toStringTag` of the object to clone.
   * @param {boolean} [isDeep] Specify a deep clone.
   * @returns {Object} Returns the initialized clone.
   */
  function initCloneByTag(object, tag, isDeep) {
    var Ctor = object.constructor;
    switch (tag) {
      case arrayBufferTag$1:
        return _cloneArrayBuffer(object);

      case boolTag$1:
      case dateTag$1:
        return new Ctor(+object);

      case dataViewTag$2:
        return _cloneDataView(object, isDeep);

      case float32Tag$1: case float64Tag$1:
      case int8Tag$1: case int16Tag$1: case int32Tag$1:
      case uint8Tag$1: case uint8ClampedTag$1: case uint16Tag$1: case uint32Tag$1:
        return _cloneTypedArray(object, isDeep);

      case mapTag$2:
        return new Ctor;

      case numberTag$1:
      case stringTag$1:
        return new Ctor(object);

      case regexpTag$1:
        return _cloneRegExp(object);

      case setTag$2:
        return new Ctor;

      case symbolTag:
        return _cloneSymbol(object);
    }
  }

  var _initCloneByTag = initCloneByTag;

  /** Built-in value references. */
  var objectCreate = Object.create;

  /**
   * The base implementation of `_.create` without support for assigning
   * properties to the created object.
   *
   * @private
   * @param {Object} proto The object to inherit from.
   * @returns {Object} Returns the new object.
   */
  var baseCreate = (function() {
    function object() {}
    return function(proto) {
      if (!isObject_1(proto)) {
        return {};
      }
      if (objectCreate) {
        return objectCreate(proto);
      }
      object.prototype = proto;
      var result = new object;
      object.prototype = undefined;
      return result;
    };
  }());

  var _baseCreate = baseCreate;

  /**
   * Initializes an object clone.
   *
   * @private
   * @param {Object} object The object to clone.
   * @returns {Object} Returns the initialized clone.
   */
  function initCloneObject(object) {
    return (typeof object.constructor == 'function' && !_isPrototype(object))
      ? _baseCreate(_getPrototype(object))
      : {};
  }

  var _initCloneObject = initCloneObject;

  /** `Object#toString` result references. */
  var mapTag$3 = '[object Map]';

  /**
   * The base implementation of `_.isMap` without Node.js optimizations.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a map, else `false`.
   */
  function baseIsMap(value) {
    return isObjectLike_1(value) && _getTag(value) == mapTag$3;
  }

  var _baseIsMap = baseIsMap;

  /* Node.js helper references. */
  var nodeIsMap = _nodeUtil && _nodeUtil.isMap;

  /**
   * Checks if `value` is classified as a `Map` object.
   *
   * @static
   * @memberOf _
   * @since 4.3.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a map, else `false`.
   * @example
   *
   * _.isMap(new Map);
   * // => true
   *
   * _.isMap(new WeakMap);
   * // => false
   */
  var isMap = nodeIsMap ? _baseUnary(nodeIsMap) : _baseIsMap;

  var isMap_1 = isMap;

  /** `Object#toString` result references. */
  var setTag$3 = '[object Set]';

  /**
   * The base implementation of `_.isSet` without Node.js optimizations.
   *
   * @private
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a set, else `false`.
   */
  function baseIsSet(value) {
    return isObjectLike_1(value) && _getTag(value) == setTag$3;
  }

  var _baseIsSet = baseIsSet;

  /* Node.js helper references. */
  var nodeIsSet = _nodeUtil && _nodeUtil.isSet;

  /**
   * Checks if `value` is classified as a `Set` object.
   *
   * @static
   * @memberOf _
   * @since 4.3.0
   * @category Lang
   * @param {*} value The value to check.
   * @returns {boolean} Returns `true` if `value` is a set, else `false`.
   * @example
   *
   * _.isSet(new Set);
   * // => true
   *
   * _.isSet(new WeakSet);
   * // => false
   */
  var isSet = nodeIsSet ? _baseUnary(nodeIsSet) : _baseIsSet;

  var isSet_1 = isSet;

  /** Used to compose bitmasks for cloning. */
  var CLONE_DEEP_FLAG = 1,
      CLONE_FLAT_FLAG = 2,
      CLONE_SYMBOLS_FLAG = 4;

  /** `Object#toString` result references. */
  var argsTag$2 = '[object Arguments]',
      arrayTag$1 = '[object Array]',
      boolTag$2 = '[object Boolean]',
      dateTag$2 = '[object Date]',
      errorTag$1 = '[object Error]',
      funcTag$2 = '[object Function]',
      genTag$1 = '[object GeneratorFunction]',
      mapTag$4 = '[object Map]',
      numberTag$2 = '[object Number]',
      objectTag$2 = '[object Object]',
      regexpTag$2 = '[object RegExp]',
      setTag$4 = '[object Set]',
      stringTag$2 = '[object String]',
      symbolTag$1 = '[object Symbol]',
      weakMapTag$2 = '[object WeakMap]';

  var arrayBufferTag$2 = '[object ArrayBuffer]',
      dataViewTag$3 = '[object DataView]',
      float32Tag$2 = '[object Float32Array]',
      float64Tag$2 = '[object Float64Array]',
      int8Tag$2 = '[object Int8Array]',
      int16Tag$2 = '[object Int16Array]',
      int32Tag$2 = '[object Int32Array]',
      uint8Tag$2 = '[object Uint8Array]',
      uint8ClampedTag$2 = '[object Uint8ClampedArray]',
      uint16Tag$2 = '[object Uint16Array]',
      uint32Tag$2 = '[object Uint32Array]';

  /** Used to identify `toStringTag` values supported by `_.clone`. */
  var cloneableTags = {};
  cloneableTags[argsTag$2] = cloneableTags[arrayTag$1] =
  cloneableTags[arrayBufferTag$2] = cloneableTags[dataViewTag$3] =
  cloneableTags[boolTag$2] = cloneableTags[dateTag$2] =
  cloneableTags[float32Tag$2] = cloneableTags[float64Tag$2] =
  cloneableTags[int8Tag$2] = cloneableTags[int16Tag$2] =
  cloneableTags[int32Tag$2] = cloneableTags[mapTag$4] =
  cloneableTags[numberTag$2] = cloneableTags[objectTag$2] =
  cloneableTags[regexpTag$2] = cloneableTags[setTag$4] =
  cloneableTags[stringTag$2] = cloneableTags[symbolTag$1] =
  cloneableTags[uint8Tag$2] = cloneableTags[uint8ClampedTag$2] =
  cloneableTags[uint16Tag$2] = cloneableTags[uint32Tag$2] = true;
  cloneableTags[errorTag$1] = cloneableTags[funcTag$2] =
  cloneableTags[weakMapTag$2] = false;

  /**
   * The base implementation of `_.clone` and `_.cloneDeep` which tracks
   * traversed objects.
   *
   * @private
   * @param {*} value The value to clone.
   * @param {boolean} bitmask The bitmask flags.
   *  1 - Deep clone
   *  2 - Flatten inherited properties
   *  4 - Clone symbols
   * @param {Function} [customizer] The function to customize cloning.
   * @param {string} [key] The key of `value`.
   * @param {Object} [object] The parent object of `value`.
   * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
   * @returns {*} Returns the cloned value.
   */
  function baseClone(value, bitmask, customizer, key, object, stack) {
    var result,
        isDeep = bitmask & CLONE_DEEP_FLAG,
        isFlat = bitmask & CLONE_FLAT_FLAG,
        isFull = bitmask & CLONE_SYMBOLS_FLAG;

    if (customizer) {
      result = object ? customizer(value, key, object, stack) : customizer(value);
    }
    if (result !== undefined) {
      return result;
    }
    if (!isObject_1(value)) {
      return value;
    }
    var isArr = isArray_1(value);
    if (isArr) {
      result = _initCloneArray(value);
      if (!isDeep) {
        return _copyArray(value, result);
      }
    } else {
      var tag = _getTag(value),
          isFunc = tag == funcTag$2 || tag == genTag$1;

      if (isBuffer_1$1(value)) {
        return _cloneBuffer(value, isDeep);
      }
      if (tag == objectTag$2 || tag == argsTag$2 || (isFunc && !object)) {
        result = (isFlat || isFunc) ? {} : _initCloneObject(value);
        if (!isDeep) {
          return isFlat
            ? _copySymbolsIn(value, _baseAssignIn(result, value))
            : _copySymbols(value, _baseAssign(result, value));
        }
      } else {
        if (!cloneableTags[tag]) {
          return object ? value : {};
        }
        result = _initCloneByTag(value, tag, isDeep);
      }
    }
    // Check for circular references and return its corresponding clone.
    stack || (stack = new _Stack);
    var stacked = stack.get(value);
    if (stacked) {
      return stacked;
    }
    stack.set(value, result);

    if (isSet_1(value)) {
      value.forEach(function(subValue) {
        result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
      });
    } else if (isMap_1(value)) {
      value.forEach(function(subValue, key) {
        result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
      });
    }

    var keysFunc = isFull
      ? (isFlat ? _getAllKeysIn : _getAllKeys)
      : (isFlat ? keysIn_1 : keys_1);

    var props = isArr ? undefined : keysFunc(value);
    _arrayEach(props || value, function(subValue, key) {
      if (props) {
        key = subValue;
        subValue = value[key];
      }
      // Recursively populate clone (susceptible to call stack limits).
      _assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
    });
    return result;
  }

  var _baseClone = baseClone;

  /** Used to compose bitmasks for cloning. */
  var CLONE_DEEP_FLAG$1 = 1,
      CLONE_SYMBOLS_FLAG$1 = 4;

  /**
   * This method is like `_.clone` except that it recursively clones `value`.
   *
   * @static
   * @memberOf _
   * @since 1.0.0
   * @category Lang
   * @param {*} value The value to recursively clone.
   * @returns {*} Returns the deep cloned value.
   * @see _.clone
   * @example
   *
   * var objects = [{ 'a': 1 }, { 'b': 2 }];
   *
   * var deep = _.cloneDeep(objects);
   * console.log(deep[0] === objects[0]);
   * // => false
   */
  function cloneDeep(value) {
    return _baseClone(value, CLONE_DEEP_FLAG$1 | CLONE_SYMBOLS_FLAG$1);
  }

  var cloneDeep_1 = cloneDeep;

  // 

  /**
   * Used internally by vue-server-test-utils and test-utils to propagate/create vue instances.
   * This method is wrapped by createLocalVue in test-utils to provide a different public API signature
   * @param {Component} _Vue
   * @param {VueConfig} config
   * @returns {Component}
   */
  function _createLocalVue(
    _Vue,
    config
  ) {
    if ( _Vue === void 0 ) _Vue = Vue__default['default'];
    if ( config === void 0 ) config = {};

    var instance = _Vue.extend();

    // clone global APIs
    Object.keys(_Vue).forEach(function (key) {
      if (!instance.hasOwnProperty(key)) {
        var original = _Vue[key];
        // cloneDeep can fail when cloning Vue instances
        // cloneDeep checks that the instance has a Symbol
        // which errors in Vue < 2.17 (https://github.com/vuejs/vue/pull/7878)
        try {
          instance[key] =
            typeof original === 'object' ? cloneDeep_1(original) : original;
        } catch (e) {
          instance[key] = original;
        }
      }
    });

    // config is not enumerable
    instance.config = cloneDeep_1(Vue__default['default'].config);

    // if a user defined errorHandler is defined by a localVue instance via createLocalVue, register it
    instance.config.errorHandler = config.errorHandler;

    // option merge strategies need to be exposed by reference
    // so that merge strats registered by plugins can work properly
    instance.config.optionMergeStrategies = Vue__default['default'].config.optionMergeStrategies;

    // make sure all extends are based on this instance.
    // this is important so that global components registered by plugins,
    // e.g. router-link are created using the correct base constructor
    instance.options._base = instance;

    // compat for vue-router < 2.7.1 where it does not allow multiple installs
    if (instance._installedPlugins && instance._installedPlugins.length) {
      instance._installedPlugins.length = 0;
    }
    var use = instance.use;
    instance.use = function (plugin) {
      var rest = [], len = arguments.length - 1;
      while ( len-- > 0 ) rest[ len ] = arguments[ len + 1 ];

      if (plugin.installed === true) {
        plugin.installed = false;
      }
      if (plugin.install && plugin.install.installed === true) {
        plugin.install.installed = false;
      }
      use.call.apply(use, [ instance, plugin ].concat( rest ));
    };
    return instance
  }

  // 

  function isValidSlot(slot) {
    return isVueComponent(slot) || typeof slot === 'string'
  }

  function requiresTemplateCompiler(slot) {
    if (typeof slot === 'string' && !vueTemplateCompiler.compileToFunctions) {
      throwError(
        "vueTemplateCompiler is undefined, you must pass " +
          "precompiled components if vue-template-compiler is " +
          "undefined"
      );
    }
  }

  function validateSlots(slots) {
    Object.keys(slots).forEach(function (key) {
      var slot = Array.isArray(slots[key]) ? slots[key] : [slots[key]];

      slot.forEach(function (slotValue) {
        if (!isValidSlot(slotValue)) {
          throwError(
            "slots[key] must be a Component, string or an array " +
              "of Components"
          );
        }
        requiresTemplateCompiler(slotValue);
      });
    });
  }

  function vueExtendUnsupportedOption(option) {
    return (
      "options." + option + " is not supported for " +
      "components created with Vue.extend in Vue < 2.3. " +
      "You can set " + option + " to false to mount the component."
    )
  }
  // these options aren't supported if Vue is version < 2.3
  // for components using Vue.extend. This is due to a bug
  // that means the mixins we use to add properties are not applied
  // correctly
  var UNSUPPORTED_VERSION_OPTIONS = ['mocks', 'stubs', 'localVue'];

  function validateOptions(options, component) {
    if (
      options.attachTo &&
      !isHTMLElement(options.attachTo) &&
      !isDomSelector(options.attachTo)
    ) {
      throwError(
        "options.attachTo should be a valid HTMLElement or CSS selector string"
      );
    }
    if ('attachToDocument' in options) {
      warnDeprecated(
        "options.attachToDocument is deprecated in favor of options.attachTo and will be removed in a future release"
      );
    }
    if (options.parentComponent && !isPlainObject(options.parentComponent)) {
      throwError(
        "options.parentComponent should be a valid Vue component options object"
      );
    }

    if (!isFunctionalComponent(component) && options.context) {
      throwError(
        "mount.context can only be used when mounting a functional component"
      );
    }

    if (options.context && !isPlainObject(options.context)) {
      throwError('mount.context must be an object');
    }

    if (VUE_VERSION < 2.3 && isConstructor(component)) {
      UNSUPPORTED_VERSION_OPTIONS.forEach(function (option) {
        if (options[option]) {
          throwError(vueExtendUnsupportedOption(option));
        }
      });
    }

    if (options.slots) {
      compileTemplateForSlots(options.slots);
      // validate slots outside of the createSlots function so
      // that we can throw an error without it being caught by
      // the Vue error handler
      // $FlowIgnore
      validateSlots(options.slots);
    }
  }

  Vue__default['default'].config.productionTip = false;
  Vue__default['default'].config.devtools = false;

  function mount(component, options) {
    if ( options === void 0 ) options = {};

    warnIfNoWindow();

    polyfill();

    addGlobalErrorHandler(Vue__default['default']);

    var _Vue = _createLocalVue(
      options.localVue,
      options.localVue ? options.localVue.config : undefined
    );

    var mergedOptions = mergeOptions(options, config);

    validateOptions(mergedOptions, component);

    var parentVm = createInstance(component, mergedOptions, _Vue);

    var el =
      options.attachToDocument || options.attachTo instanceof HTMLBodyElement
        ? createElement()
        : options.attachTo;
    var vm = parentVm.$mount(el);

    component._Ctor = {};

    throwIfInstancesThrew(vm);

    var wrapperOptions = {
      attachedToDocument: !!el
    };

    var root = parentVm.$options._isFunctionalContainer
      ? vm._vnode
      : vm.$children[0];

    return createWrapper(root, wrapperOptions)
  }

  // 


  function shallowMount(
    component,
    options
  ) {
    if ( options === void 0 ) options = {};

    return mount(component, Object.assign({}, options,
      {shouldProxy: true}))
  }

  // 

  /**
   * Returns a local vue instance to add components, mixins and install plugins without polluting the global Vue class
   * @param {VueConfig} config
   * @returns {Component}
   */
  function createLocalVue(config) {
    if ( config === void 0 ) config = {};

    return _createLocalVue(undefined, config)
  }

  // 
  var toTypes = [String, Object];
  var eventTypes = [String, Array];

  var RouterLinkStub = {
    name: 'RouterLinkStub',
    props: {
      to: {
        type: toTypes,
        required: true
      },
      tag: {
        type: String,
        default: 'a'
      },
      exact: Boolean,
      exactPath: Boolean,
      append: Boolean,
      replace: Boolean,
      activeClass: String,
      exactActiveClass: String,
      exactPathActiveClass: String,
      event: {
        type: eventTypes,
        default: 'click'
      }
    },
    render: function render(h) {
      return h(this.tag, undefined, this.$slots.default)
    }
  };

  function shallow(component, options) {
    warn(
      "shallow has been renamed to shallowMount. shallow " +
        "will be removed in 1.0.0, use shallowMount instead"
    );
    return shallowMount(component, options)
  }

  exports.ErrorWrapper = ErrorWrapper;
  exports.RouterLinkStub = RouterLinkStub;
  exports.Wrapper = Wrapper;
  exports.WrapperArray = WrapperArray;
  exports.config = config;
  exports.createLocalVue = createLocalVue;
  exports.createWrapper = createWrapper;
  exports.enableAutoDestroy = enableAutoDestroy;
  exports.mount = mount;
  exports.resetAutoDestroyState = resetAutoDestroyState;
  exports.shallow = shallow;
  exports.shallowMount = shallowMount;

  Object.defineProperty(exports, '__esModule', { value: true });

})));