I’ve seen some complex vanilla js uis back in the days. They all ended up building some framework similar to react or angular. There is no other way to manage

I’ve seen some complex vanilla js uis back in the days. They all ended up building some framework similar to react or angular. There is no other way to manage the growing complexity than to invent some “engine” and a set of rules. So your question has the answer in itself. There is no “or”. React _is_ HTML/CSS/JS, but organized for complex projects. And definitely not for any project. I bet most of “js justice” warrior have never got their hands deep in really big uis