Trying to detect browser close event

Question

I have tried many methods to detect browser close event through jQuery or JavaScript. But, unfortunately, I have not been able to detect the close. The onbeforeunload and onunload methods are also not working.

How do I detect the window close, unload, or beforeunload events?

Answer 1

Have you tried this code?

window.onbeforeunload = function (event) {     var message = 'Important: Please click on \'Save\' button to leave this page.';     if (typeof event == 'undefined') {         event = window.event;     }     if (event) {         event.returnValue = message;     }     return message; };  $(function () {     $("a").not('#lnkLogOut').click(function () {         window.onbeforeunload = null;     });     $(".btn").click(function () {         window.onbeforeunload = null; }); }); 

The second function is optional to avoid prompting while clicking on #lnkLogOut and .btn elements.

One more thing, The custom Prompt will not work in Firefox (even in latest version also). For more details about it, please go to this thread.