Bug: reports incorrect error on aria-errormessage (ARIA 1.2)

[Zidious]

Ref: dequelabs/axe-core-npm#328

ARIA 1.2

axe-core not reporting that content is hidden when aria-errormessage is referenced by a hidden element.

[dylanb]

Is the error incorrect or is it just missing the information about the content being hidden?
What about aria-labelledby as a way to announce the error message in addition to the ones we currently check for?

[Zidious]

One of the examples given was:

<input type="text" id="input-1" aria-invalid="true" aria-errormessage="id-message-1" ></div>
<div id="id-message-1" hidden>Error message 1</div>

In ARIA 1.2, it should say something about the content being hidden in this case the hidden div I have played around with in aria-errormessage-evaluate.js and I can get the rule to move into the incomplete but it would involve amending the corresponding .json file to state ensure aria-errormessage value references an existing visible element. Is this something we would want to do? I could push the PR, would like some eyes on it.

Edit: had some feedback on it during a pairing session - will amend and then push.

[straker]

cc @spectranaut. Fixed in #3156

[padmavemulapati]

Validated with the latest axe-core-develop branch code base,
Seeing the proper error message on aria-errormessage , when content is hidden and is referenced by a hidden element.

Earlier the message is be like