"The attribute 'aria-expanded' is not supported by the role 'tabpanel'"

[xamir82]

Describe the bug

This accessibility warning is wrong:

The attribute 'aria-expanded' is not supported by the role 'tabpanel'

It is — from the spec:

For a multi-selectable tablist, authors SHOULD ensure each visible tabpanel has its aria-expanded attribute set to true, and that the remaining hidden tabpanel elements have their aria-expanded attributes set to false.

Reproduction

Logs

No response

System Info

-

Severity

annoyance

[brunnerh]

The heck is a "multi-selectable tablist" in the first place, though?