alt Hacker NewsLook at how much effort has gone into just getting a stylable select box. Look at tooltips. A data grid is several orders of magnitude higher in complexity than both of these. You are severely underestimating the complexity of your ask. HTML/JS/CSS is not supposed to solve all your UX problems. It’s a toolkit for building UIs, not a framework.
Is it not the design by committee approach that slows down the design consensus on things like these? Just complex is it to design a spec for a stylable select box that is reasonable for most use cases?
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.