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IsExtensible.js « 2017 « es-abstract « node_modules - github.com/npm/cli.git - Unnamed repository; edit this file 'description' to name the repository.
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'use strict';

var GetIntrinsic = require('../GetIntrinsic');

var $Object = GetIntrinsic('%Object%');

var isPrimitive = require('../helpers/isPrimitive');

var $preventExtensions = $Object.preventExtensions;
var $isExtensible = $Object.isExtensible;

// https://www.ecma-international.org/ecma-262/6.0/#sec-isextensible-o

module.exports = $preventExtensions
	? function IsExtensible(obj) {
		return !isPrimitive(obj) && $isExtensible(obj);
	}
	: function IsExtensible(obj) {
		return !isPrimitive(obj);
	};