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.
functor (H : Hashtbl.HashedType) -> sig type data = H.t type t val create : int -> t val clear : t -> unit val merge : t -> data -> data val add : t -> data -> unit val remove : t -> data -> unit val find : t -> data -> data val find_all : t -> data -> data list val mem : t -> data -> bool val iter : (data -> unit) -> t -> unit val fold : (data -> 'a -> 'a) -> t -> 'a -> 'a val count : t -> int val stats : t -> int * int * int * int * int * int end