Pagination could be argued as well, but at least that's simple-ish to implement (but still, it's such a common UI pattern that it ought to be handled in a unified way by browsers IMO)
If it has to take decades to agree on a design for a stylable select box, then there is something fundamentally broken with the approach.
While maybe you could imagine a straightforward technical implementation (and I think you’re overlooking the complexity of getting the API right while making it extensible), the social engineering involved to make this happen would be Herculean. And it would be for an element that’s on less than 1% of web pages. If you really want a data grid, I’d suggest learning how to code one. It’s a fun challenge, and implementing basic features like sorting and filtering isn’t difficult using a modern framework. If it is difficult for you, then I’d suggest that it would be a GREAT experience to try. Then imagine how you’d make it extensible for unknown use cases.
The main reason it took decades for a stylable select box is because for two decades, we were just told “Don’t style select boxes. It’s bad for usability,” which was a mistake. We’ve only started to overcome that mindset in the past few years. The work on stylable select boxes only started in the past few years.
There's a difference between design-by-committee, and approval by committee. I'm arguing against the former. This is not to say that I have much hope that my approach will prevail, but it is an indictment of the W3C/WHATWG that they have not figured out a better process for producing technically excellent and coherent designs/specs in reasonable time.
Just invite submissions from small teams that each have produced a coherent design, and then the hard process of agreeing/voting on them will be a bit easier.
> If you really want a data grid, I’d suggest learning how to code one.
I have designed and implemented highly sophisticated data grids, and I have published related libraries on NPM. I wonder what in my comments makes you think I lack the competence or experience to implement one.
The problem is the JS bloat that we have to deal with. It is ugly that we have to load megabytes of JS to render any reasonably sophisticated web UI. Multiply that by the millions of sites that have to do that, plus all the upstream dependencies that are loaded with that, and also consider all the security/privacy issues with so much JS, and hopefully you'll begin to understand the critical need for a revamp of the HTML space.