https://www.funandmoving.com/service-worker.js

1
2self.addEventListener('install', function (event) {
3  event.waitUntil(
4    caches.open('sw-cache').then(function (cache) {
5      console.log("Installed.....");
6      return cache.add("/");
7    })
8  );
9});
10
11self.addEventListener('activate', function (event) {
12  console.log("activate.....");
13});
14
15self.addEventListener('fetch', function (event) {
16  var request = event.request;
17  var url;
18
19  try {
20    url = new URL(request.url);
21  } catch (e) {
22    return;
23  }
24
25  // SW cannot fetch extension/data/blob/etc. Let the browser handle them.
26  if (url.protocol !== 'http:' && url.protocol !== 'https:') {
27    return;
28  }
29
30  // Chrome rejects this combination; do not intercept.
31  if (request.cache === 'only-if-cached' && request.mode !== 'same-origin') {
32    return;
33  }
34
35  // Cross-origin (GA, Ads, Translate, HubSpot, fonts, CDNs): native browser fetch.
36  // Avoids wrapping third-party/blocked requests. Same success path as today's passthrough.
37  if (url.origin !== self.location.origin) {
38    return;
39  }
40
41  event.respondWith(
42    fetch(request).catch(function () {
43      return Response.error();
44    })
45  );
46});
47
48/*---------------------------*/