1656769 - label element around <output> = no acc name

Status: RESOLVED INVALID

(Core :: Disability Access APIs, defect)

Description

[steve faulkner]

Test 4 on this test page fails
https://thepaciellogroup.github.io/AT-browser-tests/test-files/output.html

expected behaviour: the child text of the label element is the accessible name for the output element

observed behaviour: output element has no accessible name

code example:

<label>
	Label wrapping output
	<output id="output4">10</output>
</label>

Comment 1

[James Teh [:Jamie]]

I think this is due to this check which excludes labelling by ancestor for elements which aren't "widgets":
https://searchfox.org/mozilla-central/rev/0e309417bdc73be33fc93f6bd7a0d4063d2c6e51/accessible/base/AccIterator.cpp#133
That was added in bug 687393. However, in bug 1226000, an IsLabel method was added which we might be able to use instead of checking for widget.

Comment 2

[steve faulkner]

Sorry, this is a false issue, the output element only requires an acc name from aria-label and aria-labelledby https://w3c.github.io/html-aam/#output-element-accessible-description-computation

Comment 3

[James Teh [:Jamie]]

We might have a bug in the HTML AAM here, too. I haven't checked the actual HTML spec yet, but MDN says that the output element is "labelable":
https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Form_labelable
Mozilla's DOM code also agrees (despite the a11y engine's failure to honour this). Unless both MDN and Mozilla DOM are wrong?

Comment 4

[James Teh [:Jamie]]

I guess maybe this was done in HTML AAM so the subtree is used in preference to a wrapping label? Hmm. I think I'm just going to leave this alone.