Alert not working in .unload() ????

Question

Alert not working in .unload() ????

Answer 1

$(window).on("unload", function() {
x = alert("Alert when document unloads.");
return x;
});

Most browsers will ignore calls to alert(), confirm() and prompt() inside the event handler. Read more.. https://api.jquery.com/unload/

Answer 2

hey berger thanks for help but i need call a funtion on mobile back button press

Answer 3

and show my custom msg