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

From: <bugzilla@jessica.w3.org>
Date: Fri, 10 Sep 2010 14:48:47 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1Ou4uF-0002Bx-99@jessica.w3.org>

--- Comment #28 from Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>  2010-09-10 14:48:39 ---
(In reply to comment #25)

> In HTML5 alt="" is mapped to role="presentation" so AT will no longer be able
> to provide a choice to users as to whether they get an indication that an image
> is present or not.

Taking away an option for the user, is one side of it, indeed.  Is e.g. JAWS
really going to do that? If they aren't, then role=_img_ on an <img> with empty
@alt will work differently in JAWS compared with AT which _does_ map alt="" to
role="presentation". See below.

(In reply to comment #27)
> (In reply to comment #26)

> > So <img alt="" src="*"> as currently implemented maps to role="img", except
> > that isn't (by default) announced?
> in firefox and IE yes on windows . its not possible to check on the other
> browsers as they don't expose the accessibility API information well.
> In safari 5 on Mac OSX <img alt=""> is not exposed as an image.

I believe that it is simple to test this, without a11y API info. Simply:

1. Insert an <img> with an empty alt="" and set it to role="img" into a page.  
     (In other words <img src="*" role="img" alt="">.)
2. Check whether the role="img" causes the AT to announce the <img> to the
     despite the empty @alt.

In Safari 5 with VoiceOver, the above <img> is announced to the user. Not so in
Jaws with IE. (Unless, of course, aria-labelledby="*" points to a label. which
again means - VOILA - that it is incorrect to have role="presentation" as
strong semantics for an <img> with empty alt=""! I'll open separate bug.) It
seems to me that it is quite important to clarify whether VoiceOver or JAWS is
correct w.r.t. exposing an <img> with empty alt="" and role="img".

(That said, the opposite isn't true: setting <img alt="Foo" role="presentation"
> does not make the AT read the @alt text.)

PS: Doesn't this bug depend on bug 10666?

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Received on Friday, 10 September 2010 14:48:49 UTC

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