How to control when closing a window

Question

I have this code, which alerts the user that the window is about to be closed and the user may loose the data. If the user accpets the window closes, if not, the user stays on the page.

<script language='javascript'>
   ClosingVar =true
   window.onbeforeunload = ExitCheck;
   function ExitCheck() {
      if(ClosingVar == true) { 
         ExitCheck = false;
         return "YOU MAY LOOSE YOUR DATA.";
      }
   } 
</script>

I want to be able to manage the option of the user. If the accept the closing option, then I want to call a function to do something and then close the window.

Does anyone know how to do this?

Thanks a lot.

It's not possible! Once the user decides to leave, there's nothing you can do, __except__ in the [window.onunload](https://developer.mozilla.org/en-US/docs/Web/API/window.onunload) handler. — adeneo, Aug 05 '13 at 22:34

score 2 · Answer 1 · edited May 23 '17 at 12:05

2

You can use the beforeunload event with Jquery.

The following link could help: link

edited May 23 '17 at 12:05

Community

1
1

answered Aug 05 '13 at 22:35

Louis Borsu

135
1
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10

score 1 · Accepted Answer · edited May 23 '17 at 10:25

Try this code I made for you, based on this question.

ps: I know the question in reference uses jQuery, but it's not required.

window.onbeforeunload = function () {

    setTimeout(function () {
        setTimeout(function () {

            alert('Welcome back!');
            // this code will run if they choose to stay on the page
            // run your other code here

        }, 100);
    }, 1);

    return 'YOU MAY LOOSE YOUR DATA.';
};

How to control when closing a window

2 Answers2

Linked