IsExtensible.js

'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);
	};