There may be javascript in the build system somewhere, but (correct me if I'm wrong) this appears to be leveraging the ocaml toolchain as a backend for reasonml

There may be javascript in the build system somewhere, but (correct me if I'm wrong) this appears to be leveraging the ocaml toolchain as a backend for reasonml rather than javascript. In fact, revery is written pretty much entirely in ocaml. It appears to allow you to write reasonml as if you're writing for react/electron, but in fact it's compiled to native code with an included gui library managed for you.