Skip to content
Permalink
9bfb9ba527
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
61 lines (55 sloc) 2.3 KB
'use strict';
var GetIntrinsic = require('get-intrinsic');
var $gOPD = require('gopd');
var $SyntaxError = GetIntrinsic('%SyntaxError%');
var $TypeError = GetIntrinsic('%TypeError%');
var isPropertyDescriptor = require('../helpers/isPropertyDescriptor');
var IsAccessorDescriptor = require('./IsAccessorDescriptor');
var IsDataDescriptor = require('./IsDataDescriptor');
var IsExtensible = require('./IsExtensible');
var IsPropertyKey = require('./IsPropertyKey');
var ToPropertyDescriptor = require('./ToPropertyDescriptor');
var SameValue = require('./SameValue');
var Type = require('./Type');
var ValidateAndApplyPropertyDescriptor = require('./ValidateAndApplyPropertyDescriptor');
// https://262.ecma-international.org/6.0/#sec-ordinarydefineownproperty
module.exports = function OrdinaryDefineOwnProperty(O, P, Desc) {
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 (!isPropertyDescriptor({
Type: Type,
IsDataDescriptor: IsDataDescriptor,
IsAccessorDescriptor: IsAccessorDescriptor
}, Desc)) {
throw new $TypeError('Assertion failed: Desc must be a Property Descriptor');
}
if (!$gOPD) {
// ES3/IE 8 fallback
if (IsAccessorDescriptor(Desc)) {
throw new $SyntaxError('This environment does not support accessor property descriptors.');
}
var creatingNormalDataProperty = !(P in O)
&& Desc['[[Writable]]']
&& Desc['[[Enumerable]]']
&& Desc['[[Configurable]]']
&& '[[Value]]' in Desc;
var settingExistingDataProperty = (P in O)
&& (!('[[Configurable]]' in Desc) || Desc['[[Configurable]]'])
&& (!('[[Enumerable]]' in Desc) || Desc['[[Enumerable]]'])
&& (!('[[Writable]]' in Desc) || Desc['[[Writable]]'])
&& '[[Value]]' in Desc;
if (creatingNormalDataProperty || settingExistingDataProperty) {
O[P] = Desc['[[Value]]']; // eslint-disable-line no-param-reassign
return SameValue(O[P], Desc['[[Value]]']);
}
throw new $SyntaxError('This environment does not support defining non-writable, non-enumerable, or non-configurable properties');
}
var desc = $gOPD(O, P);
var current = desc && ToPropertyDescriptor(desc);
var extensible = IsExtensible(O);
return ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc, current);
};