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