24 lines
449 B
JavaScript
24 lines
449 B
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var has = require('has');
|
||
|
|
|
||
|
|
var Type = require('./Type');
|
||
|
|
|
||
|
|
var assertRecord = require('../helpers/assertRecord');
|
||
|
|
|
||
|
|
// https://262.ecma-international.org/5.1/#sec-8.10.2
|
||
|
|
|
||
|
|
module.exports = function IsDataDescriptor(Desc) {
|
||
|
|
if (typeof Desc === 'undefined') {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
assertRecord(Type, 'Property Descriptor', 'Desc', Desc);
|
||
|
|
|
||
|
|
if (!has(Desc, '[[Value]]') && !has(Desc, '[[Writable]]')) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
};
|