service worker redirect to browser tab on push notification click event

serwice-worker.js

//browser push notification "onClick" event heandler
self.addEventListener('notificationclick', function(event) {
    console.log('[Service Worker] Notification click Received.');
    event.notification.close();

/**
 * if exists open browser tab with matching url just set focus to it,
 * otherwise open new tab/window with sw root scope url
 */
 event.waitUntil(clients.matchAll({
    type: "window"
  }).then(function(clientList) {
    for (var i = 0; i < clientList.length; i++) {
      var client = clientList[i];
      if (client.url == self.registration.scope && 'focus' in client) {
        return client.focus();
      }
    }
    if (clients.openWindow) {
      return clients.openWindow('/');
    }
  }));
});