After discussions with Microsoft and following the bug tracker for Firefox
it appears that <details>/<summary> is going to be implemented at some
point in both Edge and Firefox. This addresses the gaps in browser support.
A media query will need to be created at some point to handle the
showing/hiding of this element, and I see those discussions are happening,
but I believe this addresses the requirements of the digital publishing
industry.
Since this requirement is being met I would like to propose the removal of
aria-describedat from the ARIA 1.1 specification at the next ARIA Working
Group meeting. Are there any objections? Do you agree?
We can vote on the next ARIA WG call but I wanted to give people a heads
up.
Rich
Rich Schwerdtfeger