IE 8 triggers beforeUnload event when toolbar button is clicked

[Arkadiy Butermanov]

Environment:

Browser: Internet Explorer 8 OS: Windows XP

Description:

When I try to apply some formatting on text (using toolbar buttons: Bold for example), Alert message is displayed (see attached screenshot)

How to fix:

I think you should add evt.preventDefault() in onClick handler function for toolbar buttons. Because IE is triggering beforeUnload event any time when link is clicked.

Temporary fix:

I have fixed above reported issue temporary using this:

CKEDITOR.on 'instanceReady', (event) ->
  if CKEDITOR.env.ie
    $('a.cke_button').removeAttr('href')

[Jakub Ś]

1. Which editor you are using - inline or classic iframed?
2. I have tried belo code in latest CKEditor 4.3.2 and IE but I haven't got any problems with onbeforeunload popup.

   window.onbeforeunload=function(){return 'test'};
   

3. Could you please give me more details regarding how to reproduce this issue in default editor?