Show More
Commit Description:
submission report
Commit Description:
submission report
References:
File last commit:
Show/Diff file:
Action:
node_modules/es-abstract/2015/IsConcatSpreadable.js
| 25 lines
| 628 B
| application/javascript
| JavascriptLexer
|
r789 | 'use strict'; | |||
var GetIntrinsic = require('../GetIntrinsic'); | ||||
var $isConcatSpreadable = GetIntrinsic('%Symbol.isConcatSpreadable%', true); | ||||
var Get = require('./Get'); | ||||
var IsArray = require('./IsArray'); | ||||
var ToBoolean = require('./ToBoolean'); | ||||
var Type = require('./Type'); | ||||
// https://ecma-international.org/ecma-262/6.0/#sec-isconcatspreadable | ||||
module.exports = function IsConcatSpreadable(O) { | ||||
if (Type(O) !== 'Object') { | ||||
return false; | ||||
} | ||||
if ($isConcatSpreadable) { | ||||
var spreadable = Get(O, $isConcatSpreadable); | ||||
if (typeof spreadable !== 'undefined') { | ||||
return ToBoolean(spreadable); | ||||
} | ||||
} | ||||
return IsArray(O); | ||||
}; | ||||