RE: Question: testing for non-unique id values SC 4.1.1



> -----Original Message-----
> From: Jonathan Avila [mailto:jon.avila@ssbbartgroup.com]
> I think this is also a broader question -- if there is a failure for content that is
> hidden and never shown in any responsive mode such as a input without
> accessible name used as a honey pot with display:none -- is that really a failure
> of any of the criteria?
[Jason] It may be a failure. In particular, I am concerned that assistive technologies implemented in scripts (e.g., as browser extensions) may encounter difficulties. For example, if they use querySelector() or getElementById() to match an element with a specified ID, the search of the document tree won't be restricted to "visible" nodes.
The kind of script demonstrated by Lisa Seeman on behalf of the COGA Task Force at TPAC last week provides a very good example of what I have in mind. It can be implemented as a browser extension that offers cognitive support (an assistive technology) to the user.
I would only consider loosening the requirements of WCAG if we could be sure that duplicate IDs or other departures from the success criteria in "hidden" content wouldn't result in problems for assistive technologies, including those which are browser-based rather than platform-based.


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Received on Thursday, 29 September 2016 20:02:16 UTC