Warn the user if leave the current page using javascript

     In some situation user have chance to wrongly press back, close or reload button in browser, if we want to show any waning message we can use the onbeforeunload event.

Example

    window.onbeforeunload = function() { 

        return "Are you sure to go back?"; 

    };

Example Program:- (Editor)

Editor is Loading...

Output:-

Advertisement