Yes, HTML & CSS alone won't replace JS. Of course, for complicated form validation HTML is not sufficient. But IMHO it's very important to provide basic functio

Yes, HTML & CSS alone won't replace JS. Of course, for complicated form validation HTML is not sufficient. But IMHO it's very important to provide basic functionality in HTML / CSS as much as possible / reasonable. Moving the functionality to HTML / CSS can potentially improve the SEO. As for positioning, there is an experimental feature @position-try. Here I made a small demo where it handles overflows. https://waspdev.com/articles/2025-06-29/css-features-web-developers-should-know-in-2025#handling_overflows_with_position_try_fallbacks https://waspdev.com/articles/2025-06-29/css-features-web-dev... But yeah, that's kind of limited if you need nice animations or some other complicated thing. Although it's fun.