Try on a phone, it doesn’t work. Now that’s you create html only and no js you need to test all kind of devices to see quirks and try to fix it. And you’ll end up with more hacks to fix other devices and you end up adding Js. And you’ll have html only and html with js. With is much worse that just properly do it in js.

I can see the op is a js hater even tho he keep saying he’s not. Anyway doesn’t matter. Just a small note.