@DavidCarlisle and @Skillmon
You said MathJax-questions are forbidden.
But I found out, that TikzJax-questions seems to be allowed :()
----> https://tex.stackexchange.com/questions/499669/how-to-make-an-e-tex-webassembly-with-jim-fowlers-web-tex-pascal-to-wasm-compil