It’s slightly off-topic, but if someone would like to transpile Elm code, I’ve created bytes decoders for elmi/elmo files : GitHub - Warry/elm-stuff: Decode interfaces (.elmi, i.dat) and objects (.elmo, o.dat) from elm-stuff/
I started but never finished a JS generator based on it, but the kernel part was a nightmare and it kind of discouraged me.
edit: published: Warry/elm-stuff/