Reason{ML,} is just a new syntax for OCaml, still perfectly round trip translatable I believe (though that's something I expect to diverge over the years). You

Reason{ML,} is just a new syntax for OCaml, still perfectly round trip translatable I believe (though that's something I expect to diverge over the years). You can use js_of_ocaml or BuckleScript to translate either OCaml or ReasonML written code to JavaScript.