# Module Js.Opt

    module Opt: OPT  with type 'a t = 'a opt

Standard functions for manipulating possibly null values.

    type 'a t

    val empty : 'a t

No value.

    val return : 'a -> 'a t

Consider a value as an optional value.

    val map : 'a t -> ('a -> 'b) -> 'b t

Apply a function to an optional value if it is available. Returns the result of the application.

    val bind : 'a t -> ('a -> 'b t) -> 'b t

Apply a function returning an optional value to an optional value

    val test : 'a t -> bool

Returns `true` if a value is available, `false` otherwise.

    val iter : 'a t -> ('a -> unit) -> unit

Apply a function to an optional value if it is available.

    val case : 'a t -> (unit -> 'b) -> ('a -> 'b) -> 'b

Pattern matching on optional values.

    val get : 'a t -> (unit -> 'a) -> 'a

Get the value. If no value available, an alternative function is called to get a default value.

    val option : 'a option -> 'a t

Convert option type.

    val to_option : 'a t -> 'a option

Convert to option type.