Those mentioned languages were designed to compile to JS. In addition, there are general purpose languages that compile pretty well to JS: * OCaml (js_of_

Those mentioned languages were designed to compile to JS. In addition, there are general purpose languages that compile pretty well to JS: * OCaml (js_of_ocaml, bucklescript) * Haskell * etc. Those have the advantage that they have a mature ecosystem of libraries, and have very good compilers to native code on server side as well.