JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://rawgithub.com/madrobby/keymaster/master/keymaster.js"></script>
Click here and hit 1 and 2 on the keyboard.

CoffeeScript

buildHandler = (value) ->
    (e) ->
        alert value
        return

for i in [1..2]
    key i.toString(), buildHandler i