46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var GetIntrinsic = require('../GetIntrinsic');
|
||
|
|
|
||
|
|
var $gOPD = GetIntrinsic('%Object.getOwnPropertyDescriptor%');
|
||
|
|
var $TypeError = GetIntrinsic('%TypeError%');
|
||
|
|
|
||
|
|
var DefineOwnProperty = require('../helpers/DefineOwnProperty');
|
||
|
|
|
||
|
|
var FromPropertyDescriptor = require('./FromPropertyDescriptor');
|
||
|
|
var IsDataDescriptor = require('./IsDataDescriptor');
|
||
|
|
var IsExtensible = require('./IsExtensible');
|
||
|
|
var IsPropertyKey = require('./IsPropertyKey');
|
||
|
|
var SameValue = require('./SameValue');
|
||
|
|
var Type = require('./Type');
|
||
|
|
|
||
|
|
// https://www.ecma-international.org/ecma-262/6.0/#sec-createdataproperty
|
||
|
|
|
||
|
|
module.exports = function CreateDataProperty(O, P, V) {
|
||
|
|
if (Type(O) !== 'Object') {
|
||
|
|
throw new $TypeError('Assertion failed: Type(O) is not Object');
|
||
|
|
}
|
||
|
|
if (!IsPropertyKey(P)) {
|
||
|
|
throw new $TypeError('Assertion failed: IsPropertyKey(P) is not true');
|
||
|
|
}
|
||
|
|
var oldDesc = $gOPD(O, P);
|
||
|
|
var extensible = oldDesc || IsExtensible(O);
|
||
|
|
var immutable = oldDesc && (!oldDesc.writable || !oldDesc.configurable);
|
||
|
|
if (immutable || !extensible) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return DefineOwnProperty(
|
||
|
|
IsDataDescriptor,
|
||
|
|
SameValue,
|
||
|
|
FromPropertyDescriptor,
|
||
|
|
O,
|
||
|
|
P,
|
||
|
|
{
|
||
|
|
'[[Configurable]]': true,
|
||
|
|
'[[Enumerable]]': true,
|
||
|
|
'[[Value]]': V,
|
||
|
|
'[[Writable]]': true
|
||
|
|
}
|
||
|
|
);
|
||
|
|
};
|