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Re: CP, ISSUE-30: Link longdesc to role of img [Was: hypothetical question on longdesc]

From: Charles Pritchard <chuck@jumis.com>
Date: Wed, 21 Mar 2012 00:55:12 -0700
Message-ID: <4F698960.1030504@jumis.com>
To: John Foliot <john@foliot.ca>
CC: 'Silvia Pfeiffer' <silviapfeiffer1@gmail.com>, 'David Singer' <singer@apple.com>, janina@rednote.net, "'xn--mlform-iua@målform.no'" <xn--mlform-iua@xn--mlform-iua.no>, rubys@intertwingly.net, laura.lee.carlson@gmail.com, mjs@apple.com, paul.cotton@microsoft.com, public-html-a11y@w3.org, public-html@w3.org
On 3/20/2012 11:18 PM, John Foliot wrote:
> This is the very same reason why aria-describedby cannot point to "hidden"
> text, as it too will be flattened to the same string text, using the same
> computational rules.

Can we get by with aria-describedby pointing to an embedded image tag?

<video poster="poster.jpg" aria-describedby="poster" 
longdesc="videolongdesc.html" aria-label="My video">
<a href="videolongdesc.html" title="My Video"><img id="poster" 
src="poster.jpg" longdesc="posterlongdesc.html" alt="My Poster" /></a>

We're pointing aria-describedby at an element with special semantics: 
img @longdesc, and it's not a display: none/@hidden element,
so we're not violating any laws there... though I would have no 
expectation that the img could gain focus as fallback for video.

It looks kind of ok from an ARIA perspective, though it still loses a 
little something from non-aria.
I've argued we may want to look at allowing users/authors more easy 
access to displaying fallback content.

In that case, the typical user could both see the longdesc, and see the 
fallback content (and then follow that longdesc).

Received on Wednesday, 21 March 2012 07:55:41 UTC

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