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[Bug 10481] Default role of <IMG> should be "img"

From: <bugzilla@jessica.w3.org>
Date: Wed, 08 Sep 2010 10:40:11 +0000
To: public-html-a11y@w3.org
Message-Id: <E1OtI4Z-0007Cx-9W@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=10481





--- Comment #8 from steve faulkner <faulkner.steve@gmail.com>  2010-09-08 10:40:10 ---
(In reply to comment #7)
> I'm puzzled by what it means for <img> to have no role by default instead of
> img role, in terms of browser implementation. I would expect the effect of
> role=img to cause the element it is applied to (and its contents as a unit) to
> be treated like an <img> element - that is to say, in the appropriate contexts
> and depending on user configuration, a screen reader might replace it entirely
> with its text equivalent, might combine it as a unit with a link where it is
> the sole contents, or might flag it as an image. In the case of images that are
> not an <img> element, this would involve a form of text equivalent other than
> alt, e.g. specified by aria-labeledby, but in WebKit's accessibility code,
> those are presented to AT in the exact same way.
> In brief, from the implementation perspective, I think it is factually true
> that an <img> with missing or non-empty alt will be treated the same as if it
> had role=img. (<img> with empty alt is exceptional and treated the same as
> role=presentation, of course). In fact, as far as I can tell from our
> accessibility code, <img> and role=img are treated exactly the same except in
> what constitutes valid sources of text equivalents.
> Given all this, I am not sure what it means to say <img> does not have img as a
> default role. Is WebKit buggy? Should we be somehow treating <img> with no
> explicitly specified role differently from <img role=img>?

I think you will find that EVERY user agent that maps html elements to
accessibility APIs, maps the <img> element to an image/graphic role in MSAA,
IA2, ATK, UIA etc, but it appears that the editor is saying that these will all
be non conforming implementaions in HTML5

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Received on Wednesday, 8 September 2010 10:40:17 UTC

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