You're right, but I wouldn't really consider this sort of thing to be a "normal control". I get that you can implement it "only" with HTML+CSS+JS, which is probably better than as a canvas thing, but there's really no basic concept for such a thing without JS hacking, at least not as far as I could tell.
Yes what you say is true and lamentable, although I don't consider using JS to be hacking it up. At this point JS is really embedded in the model of the web rather than just a sprinkle on the top.
I had hopes for webcomponents. They do work OKish, but it's harder to make and distribute a webcomponent than make a similar thing in React and that sucks.
So yah, I can see your view, but I'm still not OK with the idea of canvas based apps replacing DOM ones. I think its like the old macromedia flash model, a part of the app you cannot interactive with the same, no text selection if the dev decides to not implement that, no content blocking so we'll get ads shoved down our throat again, poorer accessibility, closed frameworks. All that kind of jazz.
Well, I've spent 23 years developing an open source, cross-platform DAW, and so my interest in such things has nothing to do with ads or any of that stuff.
But yes, that's certainly is a risk of creating a mostly non-viewable VM inside the browser, even if that does effectively create a new platform for development that will ultimately have little or nothing to do with traditional webdev.
