“Summary” button in docs doesn’t react to description being collapsed

[schuelermine]

If you collapse the description manually the summary button should change to “Show all” since otherwise it’d do nothing

Meta

Observed on doc.rust-lang.org/nightly

Screencast.from.2024-11-14.22-04-24.webm

[lolbinarycat]

the proper way to handle this is to track the number of open panes, and switch to "show all" when that number is zero.

[lolbinarycat]

you could also just check the state of every toggle every time one is flipped, but that has O(n) performance instead of O(1).