Red (https://github.com/reasonml/red https://github.com/reasonml/red) provides a useable frontend to the ocaml debugger. If your code compiles with bucklescript

Red (https://github.com/reasonml/red https://github.com/reasonml/red) provides a useable frontend to the ocaml debugger. If your code compiles with bucklescript (most code will), the debug experience using node and the chrome inspector is surprisingly good even without source maps. The compiled ocaml maps to remarkably straight forward javascript for most code. I used both while developing Immutable-re.