anchor.diff:          evt.respondWith(
             fetch(request).then(function(response){
               caches.open(CACHE).then(function(cache) {
  -              console.log("Adding to cache: " + path)
  +              // console.log("Adding to cache: " + path)
                 cache.put(request.url, response);
               });
               return response.clone();
  
positive.code:       }).includes(true);
  
      if (serveCachedAsset) {
        console.log("The service worker is serving the asset: "+evt.request.url);
        evt.respondWith(fromCache(evt.request));
        evt.waitUntil(update(evt.request));
      }
  
negative.code: 
  self.addEventListener("install", function(evt) {
  
    // console.log("The service worker is being installed.");
  
    evt.waitUntil(precache());
  });
  