DetailsList ARIA attributes are not allowed

[sereymonyros]

Run accessibility insights app in DetailsList
Actual result: ARIA attributes are not allowed: aria-setsize="10", aria-posinset="1"
Expected result: should not see any accessibility issue at all
Repro: https://codepen.io/justslone-the-encoder/pen/vYXGJPM

Screenshot below:

[JustSlone]

@sereymonyros thanks for filing this

Confirmed repro. Here's an isolated codepen: https://codepen.io/justslone-the-encoder/pen/vYXGJPM

So, this one is a bit complicated.
In this case DetailsList is behaving more as a treegrid, and actually the absence of being able to use aria-setsize and aria-posinset was an omission from the ARIA 1.1 spec. See this issue for more info

Actually if you try out accessibility insights on the official treegrid examples it raises the same issues.
https://www.w3.org/TR/wai-aria-practices-1.1/examples/treegrid/treegrid-1.html

So, I'm tempted to say this is expected and OK, however, my one reservation is that DetailsList, even though it's behaving like a treegrid, is actually role="grid".

@smhigley, You've had some thoughts or perspective on DetailsList's confused nature here, what are your thoughts on this issue?

[ms-kykwon]

@JustSlone @dzearing Any luck on this issue?

[JustSlone]

@ms-kykwon, I believe this was fixed by another change. I'm not seeing repro anymore.

@smhigley might know more.

I am seeing an error on the group selection checkbox, but that's a different issue.

[ecraig12345]

Group selection checkbox issue is tracked by #13385

[smhigley]

Both those issues should be resolved; I think this one can just be closed now, via #17300, and I'll go comment on the separate checkbox issue.

[ms-kykwon]

@JustSlone @ecraig12345 @smhigley GroupedList have a similar issue. Would you take a look at it, please? #17943