How do I alert the user in javascript when exiting site?

Question

Javascript code to create an alert when user tries to exit website.

Answer 1

See this function: window.onbeforeunload = function () {}

Answer 2

Kk.

Answer 3

Thanks..It worked

Answer 4

<script type="text/javascript">
window.onbeforeunload = confirmExit;
function confirmExit()
{
return "Do you want to leave this page without saving?";
}
</script>

Answer 5

Please, show me how it worked... 😉

Answer 6

Thx! maybe return will be in ()?