service worker fix

sw.js

@@ -1,7 +1,7 @@
 
-self.addEventListener('install', function(e) {
+self.addEventListener('install', function (e) {
   e.waitUntil(
-      caches.open('your-magic-cache').then(function(cache) {
+    caches.open('your-magic-cache').then(function (cache) {
       return cache.addAll([
         '/website/ultimate_tictactoe/',
         '/website/ultimate_tictactoe/index.html',
@@ -24,36 +24,17 @@ self.addEventListener('install', function(e) {
       ]);
     })
   );
-  });
+});
 
-  self.addEventListener('fetch', function(event) {
+self.addEventListener('fetch', function (event) {
   event.respondWith(
-      caches.match(event.request).then(function(response) {
+    caches.match(event.request).then(function (response) {
       return response || fetch(event.request);
     })
   );
 });
 
-self.addEventListener('notificationclick', function(event) {
-  event.waitUntil(async function() {
-      const allClients = await clients.matchAll({
-          includeUncontrolled: true
-      });
-
-      var instance = None;
-
-
-      // Let's see if we already have a window open:
-      for (const client of allClients) {
-          client.focus();
-          instance = client;
-          break;
-      }
-
-      // If we didn't find an existing window,
-      // open a new one:
-      if (!instance) {
-          instance = await clients.openWindow(rel_home);
-      }
-  }());
+self.addEventListener('notificationclick', function (event) {
+  event.notification.close();
+  clients.openWindow(rel_home);
 });