extend.js (548B)
1 /* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 "use strict"; 6 7 /** 8 * Utility function, that is useful for creating objects that inherit from other 9 * objects, without associated classes. 10 * 11 * Replacement for `extends` API from "sdk/core/heritage". 12 */ 13 exports.extend = function (prototype, properties) { 14 return Object.create(prototype, Object.getOwnPropertyDescriptors(properties)); 15 };