https://bugzilla.wikimedia.org/show_bug.cgi?id=33497

       Web browser: ---
             Bug #: 33497
           Summary: editwarning dialog does not appear in IE8
           Product: MediaWiki extensions
           Version: any
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Unprioritized
         Component: WikiEditor
        AssignedTo: [email protected]
        ReportedBy: [email protected]
                CC: [email protected], [email protected]
    Classification: Unclassified


When the editwarning feature is enabled, the warning dialog does not appear in
IE8. It works fine in Firefox 8.0 and Chrome 16.0.912.63 m.  This is on Windows
Server 2008 with MediaWiki 1.18.0. (It's also broken in 1.17.1.)

I am guessing that your custom "beforeunload" handler is not working correctly
in IE8.  I tried a custom extension that seems to work fine using this ordinary
jQuery code:

$(window).bind("beforeunload",
                function() {
                  if (various conditions) {
                      return 'You will lose any edits you have made.';
                    }
                  }
                });


My configuration is:

# Vector skin feature configuration                                             
require_once( "{$IP}/extensions/Vector/Vector.php" );
$wgVectorUseSimpleSearch = true;
$wgDefaultUserOptions['vector-collapsiblenav'] = 1;
$wgVectorFeatures['editwarning']['global'] = true;
$wgDefaultUserOptions['vector-editwarning'] = 1;
$wgDefaultUserOptions['useeditwarning'] = 1;
#$wgVectorUseIconWatch = true;                                                  

# WikiEditor                                                                    
require_once( "$IP/extensions/WikiEditor/WikiEditor.php" );
$wgDefaultUserOptions['usebetatoolbar'] = 0;
$wgDefaultUserOptions['usebetatoolbar-cgd'] = 0;
$wgDefaultUserOptions['wikieditor-preview'] = 0;

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