Service Worker gotchas – https://medium.com/kollegorna/service-worker-gotchas-af20a9dab986

service-worker-caching-third-party.js

var thirdPartyExceptions = [
      'https://code.jquery.com/jquery.min.js'
    ];
// ...
event.respondWith(fetch(request).then(response => { // network
  // cache only resources from this domain as well as the exceptions
  if(location.origin === url.origin || 
     thirdPartyExceptions.includes(url.href)) {
    // addToCache use
  }
  return response;
}))
// ...