Page #'s being reported as Errors using aria-labelledby

[clapierre]

We have done a lot of experiments on the best way to encode page breaks and tested with NVDA, JAWS, and Voice Over on a Mac. Seems there are a lot of inconsistent results. the use for example with aria-label on an element with role=doc-pagebreak is that on a Mac Voice Over only says "horizontal page break" and is not speaking the aria-label of the page number.

Here is the code which is giving a serious error in ACE.

<div><span epub:type="pagebreak" role="doc-pagebreak" aria-labelledby="p3" id="page_3"></span>
<span id="p3" aria-hidden="true" hidden="hidden">3</span>
<span aria-hidden="true" class="page-number">Page 3</span></div>

However, this code in HTML / XHTML has the following behavior.
JAWS says 'Page 3'
NVDA says '3 Separator'
Voice Over says 'horizontal page break 3'

Here the publisher wants visible "Page 3", but if we make that readable by AT we get double speaking of the word "Page" by JAWS i.e. "Page" (spoken for the role=doc-pagebreak, and "Page 3" from the visible page number.
This is why we have aria-hidden="true" on the visible element and came up with using aria-labelledby which is respected by all AT to speak the AT-ONLY "3" and still speak the role= doc-pagebreak.

aria-labelledby should also be allowed as a valid label for page numbers.
Thank you.

[danielweck]

Thank you for reporting this, Charles. My intuition (without looking inside Deque Axe code) is that aria-labelledby is considered invalid due to doc-pagebreak not carrying the expected role (or maybe aria-hidden / hidden messes-up the computation of the accessible label). I need to dig further to figure this out, I think this is something we can fix in the DAISY fork of Deque Axe.

[danielweck]

Related issue: #355

[danielweck]

Hello, this is now implemented in the DAISY fork of Deque Axe and will shortly propagate to Ace core (CLI) and Ace App (GUI).
daisy/axe-core#15

[clapierre]

Thanks Daniel! awesome news.

[danielweck]

Fixed via 9050826