Also, I am not convinced that the intenret’s ideal format is a markup language. I believe there is great value in scripting. The problem is that browsers gave too much power to the websites and their remote servers over the clients computer, way beyond what is reasonable for scripting of internet documents. We need browsers whose scripting capabilities are only relevant for internet documents, not entire arbitrary applications.

Unfortunately, while HTML is more capable than a non Html-seasoned developer assumes, it is still showing that it is not enough. A lot of rough edges, a lot of what feels like incomplete or one-off features, rather than something that feels well planned and complete.

And I doubt this will change. Chrome is heavily invested in keeping a reliance on Javascript, and particularly a browser engine that is very difficult to implement.

Unpopular opinion: I don’t think this is worth the screen real estate it takes up, even if small. It’s just too specific of a feature that does not inherently need changing on the fly.

You should configure your light / dark mode preferences in your OS and browser, and sites can just pick them up from there. Changing them on the fly is unnecessary.

And for websites, you should probably just use those dark mode extensions anyways if that’s your preference. Even if a site doesn’t support it, you’ll get most of the way there.