Edit File: IsConcatSpreadable.js
'use strict'; var GetIntrinsic = require('get-intrinsic'); 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); };
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