> Since this is possible, is it also possible (and performant) to convert something like Java or rust or c# to performant JavaScript and get the full power of a

> Since this is possible, is it also possible (and performant) to convert something like Java or rust or c# to performant JavaScript and get the full power of a strongly typed language? It is possible! Java has a few compilers (TeaVM, Google Web Toolkit, JSweet). Rust is usually compiled to WASM (like C and C++). I'm not sure about C#, but F# has Fable. OCaml has two, js_of_ocaml and Rescript (formerly Bucklescript).