JavaScript Style Sheets (1997)

You can modify the styling of elements in Javascript with modern browsers, but I'm not sure it is exactly "standard", in the way that CSS is "standard". A modern form of JSSS might look like this: an HTML document with no styling/CSS, but some JS that styles each element when it is loaded. This might cause some flicker [0], because the HTML would be rendered un-styled and then re-styled by your JS code. You can mask that flicker with a sort of "loading screen" -- oh, now I know why I see those tacky pre-loaders on so many websites.

The Internet is a flat circle, in which old technology is constantly re-invented by semi-literate people. This will surely be the sole Horseman of the Internet Apocalypse: a black-and-purple checkered horse, the rider wearing a hoodie that says "my prompts bring all the ladies to the yard" and wielding AR goggles. He speaks a dozen words to command his AI legions -- they do his bidding in a thousand-thousand jobs: getting hired, attending meetings, writings emails, getting fired; each in a cycle fast enough that he is ever employed, ever influencing, ever disrupting. We have assuredly earned all that he does to the Internet.

[0] = This is alluded to in TFA: "You'll also want to be careful with your style-setting functions: get too complex and it will take your document forever to render itself in the user's browser."