bugfix: external requests fixed (ref. #31)

service-worker.js

@@ -808,12 +808,12 @@ self.addEventListener('fetch', async event => {
         // External requests go through a regular fetch()
         if (!event.request.url.startsWith(self.location.origin)) {
             self.log('service-worker', 'External request; current origin: ' + self.location.origin)
-            return void event.respondWith(fetch(event.request));
+            return fetch(event.request);
         }
 
         // Non-GET requests go through a regular fetch()
         if (event.request.method !== 'GET') {
-            return void event.respondWith(fetch(event.request));
+            return fetch(event.request);
         }
         
         // clean the URL, removing any fragment identifier