File: serviceworker_cache_first.js

package info (click to toggle)
firefox 149.0-1
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 4,767,760 kB
  • sloc: cpp: 7,416,064; javascript: 6,752,859; ansic: 3,774,850; python: 1,250,473; xml: 641,578; asm: 439,191; java: 186,617; sh: 56,634; makefile: 18,856; objc: 13,092; perl: 12,763; pascal: 5,960; yacc: 4,583; cs: 3,846; lex: 1,720; ruby: 1,002; php: 436; lisp: 258; awk: 105; sql: 66; sed: 53; csh: 10; exp: 6
file content (34 lines) | stat: -rw-r--r-- 1,002 bytes parent folder | download | duplicates (22) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
const files = ["serviceworker_page.html", "firefox-logo-nightly.svg"];
const cacheName = "v1";

self.addEventListener("install", event => {
  performance.mark("__serviceworker_event");
  console.log("[SW]:", "Install event");

  event.waitUntil(cacheAssets());
});

async function cacheAssets() {
  const cache = await caches.open(cacheName);
  await cache.addAll(files);
}

self.addEventListener("fetch", event => {
  performance.mark("__serviceworker_event");
  console.log("Handling fetch event for", event.request.url);
  event.respondWith(handleFetch(event.request));
});

async function handleFetch(request) {
  const cachedResponse = await caches.match(request);
  if (cachedResponse) {
    console.log("Found response in cache:", cachedResponse);

    return cachedResponse;
  }
  console.log("No response found in cache. About to fetch from network...");

  const networkResponse = await fetch(request);
  console.log("Response from network is:", networkResponse);
  return networkResponse;
}