[robocat]

In other words, poorly written components don't work well: which happens in other GUI toolkits and not just HTML.

Good HTML UI frameworks don't make this mistake.

[steve1977]

Are there any good HTML UI frameworks yet?

[robocat]

So long as you don't want an OS native UI, yes I think so.

For example I use Visual Studio Code every day and the UI seems pretty good to me (panels, menus, tabs, check boxes, combos etc). I am presuming it uses a component framework (although I admit I haven't looked at the source).