зеркало из https://github.com/mozilla/gecko-dev.git
61 строка
1.7 KiB
JavaScript
61 строка
1.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const {XPCOMUtils} = ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyGlobalGetters(this, ["URL"]);
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this.EXPORTED_SYMBOLS = ["navigate"];
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/** @namespace */
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this.navigate = {};
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/**
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* Determines if we expect to get a DOM load event (DOMContentLoaded)
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* on navigating to the <code>future</code> URL.
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*
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* @param {string} current
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* URL the browser is currently visiting.
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* @param {string=} future
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* Destination URL, if known.
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*
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* @return {boolean}
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* Full page load would be expected if future is followed.
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*
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* @throws TypeError
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* If <code>current</code> is not defined, or any of
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* <code>current</code> or <code>future</code> are invalid URLs.
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*/
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navigate.isLoadEventExpected = function(current, future = undefined) {
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// assume we will go somewhere exciting
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if (typeof current == "undefined") {
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throw new TypeError("Expected at least one URL");
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}
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// Assume we will go somewhere exciting
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if (typeof future == "undefined") {
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return true;
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}
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let cur = new URL(current);
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let fut = new URL(future);
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// Assume javascript:<whatever> will modify the current document
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// but this is not an entirely safe assumption to make,
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// considering it could be used to set window.location
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if (fut.protocol == "javascript:") {
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return false;
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}
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// If hashes are present and identical
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if (cur.href.includes("#") && fut.href.includes("#") &&
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cur.hash === fut.hash) {
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return false;
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}
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return true;
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};
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