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sw.js
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sw.js
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const cacheName = "Quiz";
const staticAssets = [
'./',
'./index.html',
'./style.css',
'./app.js',
'./manifest.webmanifest',
];
self.addEventListener("install",async e =>{
const cache = await caches.open(cacheName);
await cache.addAll(staticAssets);
return self.skipWaiting();
});
self.addEventListener("activate",async e =>{
self.clients.claim();
});
self.addEventListener("fetch",async e =>{
const req = e.request;
const url = new URL(req.url);
if(url.origin === location.origin){
e.respondWith(cacheFirst(req));
}else{
e.respondWith(networkAndCache(req));
}
});
async function cacheFirst(req){
const cache = await caches.open(cacheName);
const cached = await cache.match(req);
return cached || fetch(req);
}
async function networkAndCache(req){
const cache = await caches.open(cacheName);
try{
const fresh = await fetch(req);
await cache.put(req,fresh.clone());
return fresh;
}catch(e){
const cached = await cache.match(req);
return cached;
}
}