Desktop notifications in Javascript

notify.js

function notify(message, iconUrl, onclick) {
  if (!Notification) {
    alert(message); 
    return;
  }

  if (Notification.permission !== "granted")
    Notification.requestPermission();

  var notification = new Notification('', {
    icon: ironUrl,
    body: message,
  });

  notification.onclick = onclick;
}

You made a mistake in the part that says icon: ironUrl, it should be iconUrl not ironUrl