JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-latest.min.js"></script>

JavaScript

jQuery(document).bind("keydown", function(event){
            var keyCode = (event.keyCode ? event.keyCode : event.which);
    console.log("Down: "+keyCode);
            if(keyCode == 18) {
                altKey = true;
            }
        });

        jQuery(document).bind("keyup", function(event){
            var keyCode = (event.keyCode ? event.keyCode : event.which);
            console.log("Up: "+keyCode);
            if(keyCode == 18) {
                altKey = false;
            }
        });