Added exclude list for PWA caching.

sw.js

@@ -10,11 +10,22 @@ self.importScripts('{{ "/assets/data/cache-list.js" | relative_url }}');
 
 var cacheName = 'chirpy-{{ "now" | date: "%Y%m%d.%H%M" }}';
 
+
+function isExcluded(url) {
+  for (const rule of exclude) {
+    if (url.indexOf(rule) != -1) {
+      return true;
+    }
+  }
+  return false;
+}
+
+
 self.addEventListener('install', (e) => {
   self.skipWaiting();
   e.waitUntil(
     caches.open(cacheName).then((cache) => {
-      return cache.addAll(cacheList);
+      return cache.addAll(include);
     })
   );
 });
@@ -26,8 +37,10 @@ self.addEventListener('fetch', (e) => {
       /* console.log('[Service Worker] Fetching resource: ' + e.request.url); */
       return r || fetch(e.request).then((response) => {
         return caches.open(cacheName).then((cache) => {
-          /* console.log('[Service Worker] Caching new resource: ' + e.request.url); */
-          cache.put(e.request, response.clone());
+          if (!isExcluded(e.request.url)) {
+            /* console.log('[Service Worker] Caching new resource: ' + e.request.url); */
+            cache.put(e.request, response.clone());
+          }
           return response;
         });
       });