Can I cancel location.href in javascript

Question

It might sound silly, but I need this functionality.

Can I somehow cancel location.href = 'url' in javascript once it is executed?

for example on click of button i am changing current page with some resource intensive page, I want to give an option to user so that one can cancel it if next page is going to take long time to load.

Thanks and Regards

Answer 1

Yes you can. You can use the window.onbeforeunload event to return an alert message that the user can confirm or cancel. When the user cancels it, the page navigation is cancelled.

jQuery example:

    window.onbeforeunload = function () {
        return "Are you really sure?";
    }

Please note that the alert message is displayed differently in various browsers.