I've never felt so old. It's genuinely incredible to me that someone could be actively working with web technologies and not have a basic understanding of HTML/CSS/JavaScript.
Like, I get it, it's no different than starting with a high level language like JavaScript itself, but just wow. I remember when we didn't have these frameworks at all, when they were just about adding the missing stuff to js or making things a little easier for people in that world. Didn't realise we had moved on so far.
I'm not being critical btw, from the down votes I guess it came across that I was being down on OP but I'm genuinely just so surprised.
The charitable take: many of the younger f/end devs don't really know that $FRAMEWORK gets turned into Javascript. I've worked with one dev in the past 5 months who did not realise that Javascript is the underlying target of "compiling" their react project.
The uncharitable take: This was vibe-coded from a set of specs.