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As mentioned by LapinLove404 in window.onbeforeunload not working in chrome, it seems that in Chrome inside the beforeunload function, it's not possible to do anything else than changing the confirmation message.
The following code works in FF and IE, but doesn't in Chrome:
<html>
<head>
<script type="text/javascript">
window.onbeforeunload = function sair() {
alert("This alert doesn't show up in Chrome");
return "If you leave this page your data will be lost!";
}
</script>
</head>
<body>
<a href="http://www.example.com"> Leave the page </a>
</body>
</html>
How could I do something before the user leaves the page? For example, if I needed to save the page state with an asynchronous call or unset a previously set lock. I think there are many use cases for it, but unfortunately Chrome doesn't make it a trivial task. Any ideas for a workaround?
332
The functionality of onbeforeunload is very limited. I think the most you can do is return a message. You can not stop someone from leaving your page. You can't execute any code in an onbeforeunload. You could try onunload for that.
122
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