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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var has = require('has');
- var $TypeError = GetIntrinsic('%TypeError%');
- module.exports = function IsPropertyDescriptor(ES, Desc) {
- if (ES.Type(Desc) !== 'Object') {
- return false;
- }
- var allowed = {
- '[[Configurable]]': true,
- '[[Enumerable]]': true,
- '[[Get]]': true,
- '[[Set]]': true,
- '[[Value]]': true,
- '[[Writable]]': true
- };
- for (var key in Desc) { // eslint-disable-line no-restricted-syntax
- if (has(Desc, key) && !allowed[key]) {
- return false;
- }
- }
- if (ES.IsDataDescriptor(Desc) && ES.IsAccessorDescriptor(Desc)) {
- throw new $TypeError('Property Descriptors may not be both accessor and data descriptors');
- }
- return true;
- };
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