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41 lines
1.2 KiB
41 lines
1.2 KiB
'use strict'; |
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var $gOPD = require('gopd'); |
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var $TypeError = require('es-errors/type'); |
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var isObject = require('es-object-atoms/isObject'); |
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var callBound = require('call-bound'); |
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var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable'); |
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var hasOwn = require('hasown'); |
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var IsArray = require('./IsArray'); |
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var isPropertyKey = require('../helpers/isPropertyKey'); |
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var IsRegExp = require('./IsRegExp'); |
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var ToPropertyDescriptor = require('./ToPropertyDescriptor'); |
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// https://262.ecma-international.org/6.0/#sec-ordinarygetownproperty |
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module.exports = function OrdinaryGetOwnProperty(O, P) { |
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if (!isObject(O)) { |
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throw new $TypeError('Assertion failed: O must be an Object'); |
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} |
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if (!isPropertyKey(P)) { |
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throw new $TypeError('Assertion failed: P must be a Property Key'); |
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} |
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if (!hasOwn(O, P)) { |
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return void 0; |
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} |
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if (!$gOPD) { |
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// ES3 / IE 8 fallback |
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var arrayLength = IsArray(O) && P === 'length'; |
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var regexLastIndex = IsRegExp(O) && P === 'lastIndex'; |
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return { |
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'[[Configurable]]': !(arrayLength || regexLastIndex), |
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'[[Enumerable]]': $isEnumerable(O, P), |
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'[[Value]]': O[P], |
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'[[Writable]]': true |
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}; |
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} |
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return ToPropertyDescriptor($gOPD(O, P)); |
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};
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