Listen for simple hotkeys

hotkey eventListener.js

const specialKey = navigator.userAgent.indexOf('Macintosh') != -1 ? "metaKey" : "ctrlKey";
const otherKeys = ['altGraphKey','altKey','ctrlKey','metaKey','shiftKey'].filter(k => k !== specialKey);

document.addEventListener('keydown', event => {
  if (event.code === key && event[specialKey] === true && !otherKeys.some(k => event[k] === true)) {
    // Do something
    event.preventDefault();
  }
});