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node_modules/es-abstract/2017/ToPropertyDescriptor.js
| 52 lines
| 1.4 KiB
| application/javascript
| JavascriptLexer
|
| r789 | 'use strict'; | |||
| var has = require('has'); | ||||
| var GetIntrinsic = require('../GetIntrinsic'); | ||||
| var $TypeError = GetIntrinsic('%TypeError%'); | ||||
| var Type = require('./Type'); | ||||
| var ToBoolean = require('./ToBoolean'); | ||||
| var IsCallable = require('./IsCallable'); | ||||
| // https://ecma-international.org/ecma-262/5.1/#sec-8.10.5 | ||||
| module.exports = function ToPropertyDescriptor(Obj) { | ||||
| if (Type(Obj) !== 'Object') { | ||||
| throw new $TypeError('ToPropertyDescriptor requires an object'); | ||||
| } | ||||
| var desc = {}; | ||||
| if (has(Obj, 'enumerable')) { | ||||
| desc['[[Enumerable]]'] = ToBoolean(Obj.enumerable); | ||||
| } | ||||
| if (has(Obj, 'configurable')) { | ||||
| desc['[[Configurable]]'] = ToBoolean(Obj.configurable); | ||||
| } | ||||
| if (has(Obj, 'value')) { | ||||
| desc['[[Value]]'] = Obj.value; | ||||
| } | ||||
| if (has(Obj, 'writable')) { | ||||
| desc['[[Writable]]'] = ToBoolean(Obj.writable); | ||||
| } | ||||
| if (has(Obj, 'get')) { | ||||
| var getter = Obj.get; | ||||
| if (typeof getter !== 'undefined' && !IsCallable(getter)) { | ||||
| throw new TypeError('getter must be a function'); | ||||
| } | ||||
| desc['[[Get]]'] = getter; | ||||
| } | ||||
| if (has(Obj, 'set')) { | ||||
| var setter = Obj.set; | ||||
| if (typeof setter !== 'undefined' && !IsCallable(setter)) { | ||||
| throw new $TypeError('setter must be a function'); | ||||
| } | ||||
| desc['[[Set]]'] = setter; | ||||
| } | ||||
| if ((has(desc, '[[Get]]') || has(desc, '[[Set]]')) && (has(desc, '[[Value]]') || has(desc, '[[Writable]]'))) { | ||||
| throw new $TypeError('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute'); | ||||
| } | ||||
| return desc; | ||||
| }; | ||||