fix(service-worker): fixes service worker issue in init-service-worke… (#3378)

platform/viewer/public/init-service-worker.js

@@ -3,13 +3,18 @@
 // modules, so it's perfectly fine to serve this code to any browsers
 // (older browsers will just ignore it)
 //
-import { Workbox } from 'https://storage.googleapis.com/workbox-cdn/releases/5.0.0-beta.1/workbox-window.prod.mjs';
+//import { Workbox } from './workbox-window.prod.mjs';
+// proper initialization
+if( 'function' === typeof importScripts) {
+  importScripts(
+    'https://storage.googleapis.com/workbox-cdn/releases/6.5.4/workbox-window.prod.mjs'
+  );
 
-var supportsServiceWorker = 'serviceWorker' in navigator;
+  var supportsServiceWorker = 'serviceWorker' in navigator;
-var isNotLocalDevelopment =
+  var isNotLocalDevelopment =
     ['localhost', '127'].indexOf(location.hostname) === -1;
 
-if (supportsServiceWorker && isNotLocalDevelopment) {
+  if (supportsServiceWorker && isNotLocalDevelopment) {
     const swFileLocation = (window.PUBLIC_URL || '/') + 'sw.js';
     const wb = new Workbox(swFileLocation);
 
@@ -49,4 +54,6 @@ if (supportsServiceWorker && isNotLocalDevelopment) {
     });
 
     wb.register();
+  }
+
 }