JSFiddle - React, Tailwind, and code Playground

by Tgwizman

JavaScript

var kp = [], winCode = [75, 69, 89, 83];
document.onkeydown = function(e) {
    kp.push(e.keyCode);
    if (kp.length > 4) kp.shift();
    var same = true;
    for (i=0;i<4;i++) if (kp[i] !== winCode[i]) same = false;
    if (same) alert('You win');
};