Yes indeed, my natural preference is to do it on the client – but then I can't figure out a way to unit test the behavior. I don't particularly love React overa

Yes indeed, my natural preference is to do it on the client – but then I can't figure out a way to unit test the behavior. I don't particularly love React overall, but it does make it easy to write tests for client-side UX logic without needing to use headless browsers. This is a fairly big deal, as headless browser tests are slow and cumbersome.