API de notificação WebKit

Botão

<button id="button">Show Notification</button>

API de notificação WebKit

document.querySelector('#button').addEventListener('click', function() {
  if (window.webkitNotifications.checkPermission() == 0) {
    notification = window.webkitNotifications.createNotification('icon.png', 'Notification Title Goes Here', 'Notification Content Goes Here');
    notification.show();
  } else {
    window.webkitNotifications.requestPermission();
  }
}, false);