Update Tab Icon; Organize ServiceWorker

public/index.html

@@ -16,7 +16,7 @@
 
 	<!-- NOTE: Icon for tab recognition -->
 	<!-- highest resolution for Chrome & Opera -->
-	<link rel="icon" sizes="192x192" href="/public/img/app_icon.png">
+	<link rel="icon" sizes="192x192" href="favicon.ico">
 	<!-- icons for Safari -> iOS Icons -->
 	<!-- icons for IE & Windows phone -->
 	<meta name="msapplication-square70x70logo" content="icon_smalltile.png">

public/main.js

@@ -2,11 +2,10 @@
  * Main JavaScript file - Entry point of all JS files *
  ******************************************************/
 
-// NOTE: ServiceWorker Registration
+// Wait until page loaded
+window.addEventListener('load', () => {
 	if ('serviceWorker' in navigator) {
-	window.addEventListener('load', function () {
-		// Register a service worker hosted at the root of the
-		// site using the default scope ('/').
+		// NOTE: ServiceWorker Registration
 		return navigator.serviceWorker.register('serviceWorker.js', {
 			scope: '/'
 		}).then(function (registration) {
@@ -14,10 +13,11 @@ if ('serviceWorker' in navigator) {
 		}).catch(function (error) {
 			return console.log('[Service worker] Registration failed: ', error);
 		});
-	});
 	} else {
 		console.log('[ServiceWorker] are not supported.');
+		return;
 	}
+});
 
 // NOTE: Set Bootstrap materialdesign
 document.addEventListener("DOMContentLoaded", function () {

public/serviceWorker.js

@@ -107,7 +107,6 @@ self.addEventListener('activate', event => {
 /* ========================================= */
 /* NOTE: Fetch: Update logic for cache files */
 /* ========================================= */
-
 self.addEventListener('fetch', event => {
         // Provide HTTPS URL for query data.
         const dataUrl = 'https://me.efi.th-nuernberg.de/om/';