JSFiddle - React, Tailwind, and code Playground

by Glogo

HTML

try to type something after clicking on this window

JavaScript

function myStringFromCharCode(which) {
        var strKey = String.fromCharCode(which);
        
        switch(which) {
            case 13: return "Shift"
            case 17: return "Ctrl"
            case 18: return "Alt"
            // add more mappings here ...
        }
        
        return strKey;    
    }
    
    function myOnKeyUp(e) {
        alert(e.which + "=" + myStringFromCharCode(e.which));
    }
    
    document.body.onkeyup=myOnKeyUp;