Yup that's right, you can't use Erlang code on JS runtimes or JS code on Erlang runtimes. Most library code doesn't use either, so it's usable on both. Elixir

Yup that's right, you can't use Erlang code on JS runtimes or JS code on Erlang runtimes. Most library code doesn't use either, so it's usable on both. Elixir is also quite a lovely language even when not using any BEAM specific functionality! I used it a lot for writing regular sequential programs.