1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
6 * Alias for document.getElementById.
7 * @param {string} id The ID of the element to find.
8 * @return {HTMLElement} The found element or null if not found.
11 return document.getElementById(id);
15 * Creates a new URL which is the old URL with a GET param of key=value.
16 * Copied from ui/webui/resources/js/util.js.
17 * @param {string} url The base URL. There is not sanity checking on the URL so
18 * it must be passed in a proper format.
19 * @param {string} key The key of the param.
20 * @param {string} value The value of the param.
21 * @return {string} The new URL.
23 function appendParam(url, key, value) {
24 var param = encodeURIComponent(key) + '=' + encodeURIComponent(value);
26 if (url.indexOf('?') == -1)
27 return url + '?' + param;
28 return url + '&' + param;
32 * Creates a new URL by striping all query parameters.
33 * @param {string} url The original URL.
34 * @return {string} The new URL with all query parameters stripped.
36 function stripParams(url) {
37 return url.substring(0, url.indexOf('?')) || url;
41 * Extract domain name from an URL.
42 * @param {string} url An URL string.
43 * @return {string} The host name of the URL.
45 function extractDomain(url) {
46 var a = document.createElement('a');