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Role=table plus aria-owns, expectations versus reality

From: Bryan Garaventa <bryan.garaventa@ssbbartgroup.com>
Date: Fri, 13 May 2016 17:43:50 +0000
To: ARIA Working Group <public-aria@w3.org>
Message-ID: <SN1PR0301MB1981438C8B3ED6023128E4A998740@SN1PR0301MB1981.namprd03.prod.outlook.com>
Hi,
Since James N is working on the aria-owns detail, I wished to pass these two tests along with the results.

I'm working on this for a client who needs a simulated data table to be accessible, where the main table is separate from the sticky column header that floats outside of the construct. Unfortunately a common use for something like this.

So, according to what is expected, the first example denoted by "1" uses aria-owns in combination with aria-owns to provide the correct order in the accessibility tree.

This does work for reordering the accessibility tree in Firefox and Chrome, though Chrome does not support role=table so it breaks the data table construct.

JAWS17 appears to be ignoring the accessibility tree in this case, and places the external role=rowgroup container at the end of the table instead of at the beginning in accordance with what aria-owns is supposed to be doing. This only occurs in IE11, and doesn't reflect the accessibility tree at all in Firefox nor does it rearrange anything virtually.

In NVDA, nothing is reflected properly in IE11, Firefox, or Chrome.

Now, the second example uses an aria-owns hack, which is technically valid though not something most people would expect to try.

As expected it does not rearrange the accessibility tree in IE11, but does do so in Firefox and Chrome.

Using JAWS17, this works accessibily in IE11 and in Firefox, but not in Chrome. For some reason there is a ghost representation of the floating container outside of the table, which appears to be another JAWS bug.

NVDA doesn't support anything like this in IE11, Firefox, or Chrome.

So currently the only thing I can recommend to the client is the second one, and not the first, simply to get something to work properly at present, even though this goes against all expectations according to the spec.

Hopefully this research info will be helpful for others here.

All the best,
Bryan



Bryan Garaventa
Accessibility Fellow
SSB BART Group, Inc.
bryan.garaventa@ssbbartgroup.com
415.624.2709 (o)
www.SSBBartGroup.com


Received on Friday, 13 May 2016 17:44:20 UTC

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