Related to https://twitter.com/timferro/status/705189339890843648 - notify when the user types in a certain word / sequence of chars

shortcut.js

function shortcut(shortcutKeys, callback) {
  var code = shortcutKeys.toString();
  var keys = [];

  document.addEventListener('keydown', function(evt) {
    keys.push(evt.keyCode);
    
    if (keys.length > shortcutKeys.length) {
      keys.shift();
    }

    if ((keys.length === shortcutKeys.length) && (keys.toString() === code)) {
      callback();
    }
  });
}

// type 'alexandru'
shortcut([65, 76, 69, 88, 65, 78, 68, 82, 85], function() { console.log('shortcut detected'); });