Kind of unrelated to this but the person who did that devrant is theabbie (aka @PixelCraft the spammer) and based on the fact that kn0thing acc was created 3 hours before this post I think it is highly likely the @PixelCraft spammer is back again.
CSS content would be fine I guess as long as its CSS that's kind of related to JS, like modifying custom properties with JS or using an AST in JS to modify CSS. I would see WebAssembly just not fitting as much because its a whole lot more than just JS and the web.