Please find the require.js module that I wrote for Offline.
define(['offline'], function (Offline) {
//Tested with Chrome and IE11 Latest Versions as of 20140412
//Offline.js - http://github.hubspot.com/offline/
//Offline.js is a library to automatically alert your users
//when they've lost internet connectivity, like Gmail.
//It captures AJAX requests which were made while the connection
//was down, and remakes them when it's back up, so your app
//reacts perfectly.
//It has a number of beautiful themes and requires no configuration.
//Object that will be exposed to the outside world. (Revealing Module Pattern)
var OfflineDetector = {};
//Flag indicating current network status.
var isOffline = false;
//Configuration Options for Offline.js
Offline.options = {
checks: {
xhr: {
//By default Offline.js queries favicon.ico.
//Change this to hit a service that simply returns a 204.
url: 'favicon.ico'
}
},
checkOnLoad: true,
interceptRequests: true,
reconnect: true,
requests: true,
game: false
};
//Offline.js raises the 'up' event when it is able to reach
//the server indicating that connection is up.
Offline.on('up', function () {
isOffline = false;
});
//Offline.js raises the 'down' event when it is unable to reach
//the server indicating that connection is down.
Offline.on('down', function () {
isOffline = true;
});
//Expose Offline.js instance for outside world!
OfflineDetector.Offline = Offline;
//OfflineDetector.isOffline() method returns the current status.
OfflineDetector.isOffline = function () {
return isOffline;
};
//start() method contains functionality to repeatedly
//invoke check() method of Offline.js.
//This repeated call helps in detecting the status.
OfflineDetector.start = function () {
var checkOfflineStatus = function () {
Offline.check();
};
setInterval(checkOfflineStatus, 3000);
};
//Start OfflineDetector
OfflineDetector.start();
return OfflineDetector;
});
Please read this blog post and let me know your thoughts. http://zen-and-art-of-programming.blogspot.com/2014/04/html-5-offline-application-development.html It contains a code sample using offline.js to detect when the client is offline.