Comment by dansalvato

I think some of this stuff isn't the responsibility of HTML. If HTML already has a full autocomplete spec, isn't it the fault of browsers/extensions/OS if the implementation is broken? Or are you saying the spec is too ambiguous?

A lot of stuff becomes redundant under the framing that HTML is designed to provide semantics, not a user interface. How is a toggle button different from a checkbox? How are tabs different from <details>, where you can give multiple <details> tags the same name to ensure only one can be expanded at a time?

Image manipulation is totally out of scope for HTML. <input type="file"> has an attribute to limit the available choices by MIME type. Should there be special attributes for the "image" MIME type to enforce a specific resolution/aspect ratio? Can we expect every user agent to help you resize/crop to the restrictions? Surely, some of them will simply forbid the user from selecting the file. So of course, devs would favor the better user experience of accepting any image, and then providing a crop tool after the fact.

Data grid does seem like a weak spot for HTML, because there are no attributes to tell the user agent if a <table> should be possible to sort, filter, paginate, etc. It's definitely feasible for a user agent to support those operations without having to modify the DOM. (And yes, I think those attributes are the job of HTML, because not every table makes sense to sort/filter, such as tables where the context of the data is dependent on it being displayed in order.)

Generalized rant below:

Yes, there are pain points based on the user interfaces people want to build. But if we remember that a) HTML is a semantic language, not a UI language; and b) not every user agent is a visual Web browser with point-and-click controls, then the solution to some of these headaches becomes a lot less obvious. HTML is not built for the common denominator of UI; it's built to make the Web possible to navigate with nothing but a screen reader, a next/previous button, and a select/confirm button. If the baseline spec for the Web deviates from that goal, then we no longer have a Web that's as free and open as we like to think it is.

That may be incredibly obvious to the many Web devs (who are much more qualified than me) reading this, but it's not something any end user understands, unless they're forced to understand it through their use of assistive technology. But how about aspiring Web devs? Do they learn these important principles when looking up React tutorials to build some application? Probably not—they're going to hate "dealing with" HTML because it's not streamlined for their specific purpose. I'm not saying the commenter I'm replying to is part of that group (again, they're probably way more experienced than me), but it reminded me that I want to make these points to those who aren't educated on the subject matter.