User "NeilK" posted a comment on MediaWiki.r86372.

Full URL: http://www.mediawiki.org/wiki/Special:Code/MediaWiki/86372#c16316
Commit summary:

fix bug with confirm-close-window caused by jQuery upgrade, but also refactor 
and fix a bug that existed anyway

Comment:

EditWarning seems to do something similar and different, AFAICT. It registers 
an unload handler but then goes to great lengths to ensure that any *other* 
handler has priority. The impl above is simpler, just masking whatever 
behaviour was there previously.


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