Confirm to leave the page when editing a form with jQuery

Question

I am coding a form and I need a function like stackoverflow have: \"You have started writing or editing a post.\".

I\'ve looked through the code of stackoverflow to

Answer 1

You can do this using window.onbeforeunload like this:

window.onbeforeunload = function() {
    return 'Are you sure you want to navigate away from this page?';
};

So in your code, you would put that inside the success callback of your $.ajax call.

To unset the confirmation, you can do this:

window.onbeforeunload = null;

Also, see this answer: How can I override the OnBeforeUnload dialog and replace it with my own?