[eyelidlessness]

I do this too if I’m trying to play JS payload golf and the stakes are low for users, but I always feel guilty because I know it harms accessibility. JS is actually required to make an expandable/collapsible menu accessible, even if your clever pure-CSS solution seems bulletproof. It’s a shame, there really should be native controls for this kind of thing that don’t require arbitrary executable code.

[runarberg]

This is precisely what <details> <summary> is for. No javascript required. It gives the correct semantics for assistive technology, correct interactions with the keyboard, focusability, etc. I recommend you use it over the old checkbox hacks or javascripts.