no sw caching on localhost

src/index.html

@@ -46,7 +46,6 @@
       window.addEventListener('load', function() {
         navigator.serviceWorker.register('serviceworker.js')
         .then(function(registration) {
-          // Registration was successful
           // console.log('ServiceWorker registration successful with scope: ', registration.scope);
         })
         .catch(function(err) {

src/serviceworker.js

@@ -1,16 +1,18 @@
 var CACHE_NAME = 'iris-messenger-cache-v1';
 
-// stale-while-revalidate caching strategy
+// stale-while-revalidate
-self.addEventListener('fetch', function(event) {
+if (self.location.host.indexOf('localhost') !== 0) {
-  event.respondWith(
+  self.addEventListener('fetch', function(event) {
-    caches.open(CACHE_NAME).then(function(cache) {
+    event.respondWith(
-      return cache.match(event.request).then(function(response) {
+      caches.open(CACHE_NAME).then(function(cache) {
-        var fetchPromise = fetch(event.request).then(function(networkResponse) {
+        return cache.match(event.request).then(function(response) {
-          cache.put(event.request, networkResponse.clone());
+          var fetchPromise = fetch(event.request).then(function(networkResponse) {
-          return networkResponse;
+            cache.put(event.request, networkResponse.clone());
+            return networkResponse;
+          })
+          return response || fetchPromise;
         })
-        return response || fetchPromise;
       })
-    })
+    );
-  );
+  });
-});
+}