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