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- var global = require('../internals/global');
- var call = require('../internals/function-call');
- var isCallable = require('../internals/is-callable');
- var isObject = require('../internals/is-object');
- var TypeError = global.TypeError;
- // `OrdinaryToPrimitive` abstract operation
- // https://tc39.es/ecma262/#sec-ordinarytoprimitive
- module.exports = function (input, pref) {
- var fn, val;
- if (pref === 'string' && isCallable(fn = input.toString) && !isObject(val = call(fn, input))) return val;
- if (isCallable(fn = input.valueOf) && !isObject(val = call(fn, input))) return val;
- if (pref !== 'string' && isCallable(fn = input.toString) && !isObject(val = call(fn, input))) return val;
- throw TypeError("Can't convert object to primitive value");
- };
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