https://radiovivagospel.com.br/service-worker.js

1self.addEventListener('activate', function(event) {
2  var expectedCacheNames = Object.keys(CURRENT_CACHES).map(function(key) {
3    return CURRENT_CACHES[key];
4  });
5
6  event.waitUntil(
7    caches.keys().then(function(cacheNames) {
8      return Promise.all(
9        cacheNames.map(function(cacheName) {
10          if (expectedCacheNames.indexOf(cacheName) === -1) {
11            return caches.delete(cacheName);
12          }
13        })
14      );
15    })
16  );
17});
18
19self.addEventListener('fetch', function(event) {
20  event.respondWith(
21    caches.open(CURRENT_CACHES.font).then(function(cache) {
22      return cache.match(event.request).then(function(response) {
23        if (response) {
24          return response;
25        }
26
27        return fetch(event.request.clone()).then(function(response) {
28          if (response.status < 400) {
29            cache.put(event.request, response.clone());
30          }
31
32          return response;
33        });
34      });
35    })
36  );
37});
38
39self.addEventListener('message', function(event) {
40  if (event.data.action === 'skipWaiting') {
41    self.skipWaiting();
42  }
43});