Currently, I am working on a web application that uses a master page. I need to be able to detect when the user is closing the browser so that I can raise an event to clean up session variables. I attempted using the unload JavaScript event, but it seems to fire whenever I navigate from page to page. Does anyone have any suggestions or ideas on how I can accurately detect when the browser is being closed?
Give this a shot: (This is the method we utilized in our project, with a success rate of 99%)
// Starting Java Script
window.onbeforeunload = function(e) {
try {
e = e || window.event;
// Add your custom logic here.
}
catch (ex) {
alert(ex.message);
}
}
//End of Script
Simply include this script on any page. It's a windows event that triggers "Before the window is closed". Please refrain from performing time-consuming tasks here, as it may cause the browser to hang or even crash!
Best regards,
Mazhar Karimi
Implement an AJAX "heartbeat" strategy by regularly checking with the server every 30 seconds using JavaScript. If no response is received from the server within approximately one and a half minutes, you can assume that the browser window has been closed. However, keep in mind that this method may not be foolproof if the user has disabled JavaScript.
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