onbeforeunload in Opera

Question

I\'m using the code that netadictos posted to the question here. All I want to do is to display a warning when a user is navigating away from or closing a window/tab.

Answer 1

onbeforeunload is now supported in Opera 15 based on the WebKit engine but not in any prior versions based on Presto.

Answer 2

Opera does not support window.onbeforeunload at the moment. It will be supported in some future version, but has not been a sufficiently high priority to get implemented as of Opera 11.

Answer 3

Have you tried this?

history.navigationMode = 'compatible';

Reference, found via this page

I haven't actually tried it myself, but it looks promising.

Answer 4

Mobile Safari (iPhone/iPad) also doesn't support onbeforeunload, and I strongly suspect it is not likely to.

For detecting back/forward navigation there may be workarounds e.g. see Is there an alternative method to use onbeforeunload in mobile safari?.