Have you seen this one: https://github.com/kisonecat/web2js

It's TeX in wasm implemented by writing a pascal to wasm compiler, which seemed like a novel approach. (TeX is written in pascal and typically translated to C before building.)

TeX itself is a 500kb wasm file (compresses to 90k), but the images get much bigger with things like LaTeX pre-loaded.

(The author uses it to run tikz in a browser in this repository: https://github.com/kisonecat/tikzjax)