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