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dewedev/node_modules/es-abstract/2018/IsConcatSpreadable.js
dwindown 7f2dd5260f Initial commit: Developer Tools MVP with visual editor
- Complete React app with 7 developer tools
- JSON Tool with visual structured editor
- Serialize Tool with visual structured editor
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2025-08-02 09:31:26 +07:00

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JavaScript

'use strict';
var GetIntrinsic = require('get-intrinsic');
var $isConcatSpreadable = GetIntrinsic('%Symbol.isConcatSpreadable%', true);
var Get = require('./Get');
var IsArray = require('./IsArray');
var ToBoolean = require('./ToBoolean');
var isObject = require('es-object-atoms/isObject');
// https://262.ecma-international.org/6.0/#sec-isconcatspreadable
module.exports = function IsConcatSpreadable(O) {
if (!isObject(O)) {
return false;
}
if ($isConcatSpreadable) {
var spreadable = Get(O, $isConcatSpreadable);
if (typeof spreadable !== 'undefined') {
return ToBoolean(spreadable);
}
}
return IsArray(O);
};