Extending details[name] grouping to handle sets that expand and collapse together #11920
Description
What problem are you trying to solve?
After seeing #9400 I was reminded of another similar operation that would be nice to use with <details> not currently doable with only HTML.
If you visit https://github.com/tc39/test262/pull/4671/files on desktop, holding (ALT on windows/linux, ⌥ on mac) while clicking the caret for a particular file in the changeset then all the files will open and close together.
What solutions exist today?
This is achievable with ECMAScript.
How would you solve it?
reuse the details[name] grouping and perhaps have a namestyle="accordion | basket".
Anything else?
No response