ReasonML Quick Start Guide

Using a custom binding

There's nothing stopping you from writing your own custom bindings:

[@bs.send] external map: (array('a), 'a => 'b) => array('b) = "";let array = [|"first", "second", "third"|];map(array, e => e ++ "-mapped")

Of course, you should favor using the built-in bindings in the Js module instead. We'll explore more custom bindings later in this chapter.