Below is the API for the OCaml standard library. It's directly copied over from the OCaml Manual, formatted to the Reason syntax and styled accordingly. The API docs are work-in-progress; we'll be polishing these gradually!
If you're targeting JavaScript, the API docs for BuckleScript includes all of below, plus JS-specific APIs.
sig external code : char -> int = "%identity" val chr : int -> char val escaped : char -> string val lowercase : char -> char val uppercase : char -> char type t = char val compare : Char.t -> Char.t -> int external unsafe_chr : int -> char = "%identity" end