Projekt

Obecné

Profil

Stáhnout (1.23 KB) Statistiky
| Větev: | Revize:
1
'use strict';
2

    
3
var GetIntrinsic = require('../GetIntrinsic');
4

    
5
var $gOPD = require('../helpers/getOwnPropertyDescriptor');
6
var $TypeError = GetIntrinsic('%TypeError%');
7

    
8
var callBound = require('../helpers/callBound');
9

    
10
var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
11

    
12
var has = require('has');
13

    
14
var IsArray = require('./IsArray');
15
var IsPropertyKey = require('./IsPropertyKey');
16
var IsRegExp = require('./IsRegExp');
17
var ToPropertyDescriptor = require('./ToPropertyDescriptor');
18
var Type = require('./Type');
19

    
20
// https://www.ecma-international.org/ecma-262/6.0/#sec-ordinarygetownproperty
21

    
22
module.exports = function OrdinaryGetOwnProperty(O, P) {
23
	if (Type(O) !== 'Object') {
24
		throw new $TypeError('Assertion failed: O must be an Object');
25
	}
26
	if (!IsPropertyKey(P)) {
27
		throw new $TypeError('Assertion failed: P must be a Property Key');
28
	}
29
	if (!has(O, P)) {
30
		return void 0;
31
	}
32
	if (!$gOPD) {
33
		// ES3 / IE 8 fallback
34
		var arrayLength = IsArray(O) && P === 'length';
35
		var regexLastIndex = IsRegExp(O) && P === 'lastIndex';
36
		return {
37
			'[[Configurable]]': !(arrayLength || regexLastIndex),
38
			'[[Enumerable]]': $isEnumerable(O, P),
39
			'[[Value]]': O[P],
40
			'[[Writable]]': true
41
		};
42
	}
43
	return ToPropertyDescriptor($gOPD(O, P));
44
};
(64-64/112)