Last modified: 2011-12-14 17:37:27 UTC
Currently, it is perfectly possible to use html id= attributes inside a wiki page giving them arbitrary values. When using one that is also used by the skin, or duplicating id= values inside the page text, one can generate invalid html, since id= values have to be unique within html documents. While this error class is tolerated by browsers and thus does not usually cause problems to users, intended use of id= values for either styling via CSS or as fragment identifiers that browsers are expected to scroll to, is impacted. At the moment, editors are not notified of the possibility of problems, and duplicated id= values are not diagnosed. Since it is obvious that the parser could collect id= values for finding duplicates, this should be considered for the new parser. Checking the id= values is one of the tasks requiring a full page parse even during section editing, otherwise sufficient data needs to be kept with each page to know existing id= values of other sections without parsing them. I would also suggest to reserve a series of id= values for the use by MediaWiki and document that so as to reduce the likelyhood of conflicts. Since using id= attributes is a subject matter likely outside the scope of casual, unexperienced and less educated editors, I also suggest to just accept duplicates during a 2nd save, such as empty "Summary" fields. Maybe even a toggle in Special:Preferences similar to the one for the handling of empty "Summary" fields can be considered for the id= value checking. This bug is related to bug 7356.
(In reply to comment #0) > I would also suggest to reserve a series of id= values for > the use by MediaWiki and document that so as to reduce the > likelyhood of conflicts. > Generally speaking, classes and IDs added nowadays to the interface are prefixed by "mw-" to help avoid collisions with user input. In fact, this is documented at [0]. If the rest of your proposal were implemented (issuing warnings for duplicate IDs), we could throw a general warning for any ID beginning with "mw-". [0] http://www.mediawiki.org/wiki/Coding_convention#Messages - beginning with 'HTML class and ID names should be prefixed with "mw-"...'
This seems to be the same issue as bug 7356; marking as a dupe. Is there any additional information that's not already listed there? *** This bug has been marked as a duplicate of bug 7356 ***
