Is there any handler on the change of window url location in javascript or jquery ?

Question

There is a form in my html code. I need to confirm if the user wants to save the current form when they are about to redirect accidentally (by clicking on links, or clicking on the back button of the browser, etc)

I know GMail has a solution for this. It confirms whether I want to save my new mail as draft when I was leaving the page.

Answer 1

You actually want the onbeforeunload event, which will ask your user to confirm whether they want to navigate away or not:

window.onbeforeunload = function () {
    return "Are you sure you want to leave this page?";
}

https://developer.mozilla.org/en/DOM/window.onbeforeunload