False positive: 'aria-allowed-attr' fails when using 'aria-errormessage' attribute

[iamrafan]

'aria-allowed-attr' should not fail for any of the 3 cases in the below example

• Link to live demo: https://codepen.io/iamrafan/pen/zLjyKM?editors=1000#

axe-core version: 3.0.3
axe-Coconut version: 3.4.0-alpha.2

[WilcoFiers]

We've overlooked something in #517. In addition to defining aria-errormessage, we should have specified what elements its allowed on. That's a pretty silly oversight, but not too difficult to fix. Your first example would still fail. Because aria-errormessage isn't well supported, we added a check that required that if you use it, there should also be a fallback.

[iamrafan]

Sure, since aria-errormessage is a global attribute, I think is should be allowed on all the elements when a fallback is provided. Then:

• it would pass 'aria-allowed-attr' always
• it would fail 'aria-attr-valid-value' when a fallback is not provided.

[iamrafan]

@WilcoFiers I mentioned the wrong rule name, this bug is about 'aria-allowed-attr' failures. I made the rule name changes in this thread.

[WilcoFiers]

Jup, I noticed it.