Andreas Hocevar
80 lines
1.6 KiB
HTML
80 lines
1.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<!--
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Copyright 2008 The Closure Library Authors. All Rights Reserved.
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Use of this source code is governed by the Apache License, Version 2.0.
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See the COPYING file for details.
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-->
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<!--
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Author: arv@google.com (Erik Arvidsson)
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-->
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<head>
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<title>goog.net.OnlineHandler</title>
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<script src="../base.js"></script>
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<script>
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goog.require('goog.events');
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goog.require('goog.events.OnlineHandler');
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goog.require('goog.net.NetworkStatusMonitor');
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</script>
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<style>
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body {
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width: 30em;
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margin: 1em auto;
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text-align: justify;
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font: small sans-serif;
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}
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#out.online {
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border: 1px solid green;
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background: lightgreen;
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}
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#out.offline {
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border: 1px solid red;
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background: pink;
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}
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p {
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padding: 0.2em;
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}
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</style>
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</head>
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<body>
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<p>This page reports whether your browser is online or offline. It will detect
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changes to the reported state and fire events when this changes. The
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OnlineHandler acts as a wrapper around the HTML5 events <code>online</code> and
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<code>offline</code> and emulates these for older browsers.</p>
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<p>Try changing <strong>File -> Work Offline</strong> in your browser.</p>
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<p id=out></p>
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<script>
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var out = document.getElementById('out');
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var oh = new goog.events.OnlineHandler;
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function updateText() {
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out.innerHTML = 'Is online: ' + oh.isOnline();
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out.className = oh.isOnline() ? 'online' : 'offline';
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}
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goog.events.listen(oh, [goog.net.NetworkStatusMonitor.EventType.ONLINE,
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goog.net.NetworkStatusMonitor.EventType.OFFLINE],
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updateText);
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goog.events.listen(window, 'unload', function() {
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oh.dispose();
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});
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updateText();
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</script>
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</body>
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</html>
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