/** * @license * Copyright (c) 2018 The Polymer Project Authors. All rights reserved. * This code may only be used under the BSD style license found at * http://polymer.github.io/LICENSE.txt * The complete set of authors may be found at * http://polymer.github.io/AUTHORS.txt * The complete set of contributors may be found at * http://polymer.github.io/CONTRIBUTORS.txt * Code distributed by Google as part of the polymer project is also * subject to an additional IP rights grant found at * http://polymer.github.io/PATENTS.txt */ import { Part } from '../lit-html.js'; /** * Prevents re-render of a template function until a single value or an array of * values changes. * * Example: * * ```js * html` *