Simon
71 lines
1.7 KiB
JavaScript
71 lines
1.7 KiB
JavaScript
const CACHE = 'klassenportal-v2';
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const PRECACHE = [
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'/',
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'/login.html',
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'/app.html',
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'/manifest.json',
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'/favicon.svg',
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'/icons/icon-192.png',
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'/icons/icon-512.png',
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'/icons/apple-touch-icon.png',
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];
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self.addEventListener('install', e => {
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e.waitUntil(
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caches.open(CACHE)
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.then(c => c.addAll(PRECACHE))
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.then(() => self.skipWaiting())
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);
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});
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self.addEventListener('activate', e => {
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e.waitUntil(
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caches.keys()
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.then(keys => Promise.all(
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keys.filter(k => k !== CACHE).map(k => caches.delete(k))
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))
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.then(() => self.clients.claim())
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);
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});
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self.addEventListener('fetch', e => {
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const url = new URL(e.request.url);
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// Only handle same-origin GET requests
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if (url.origin !== self.location.origin) return;
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if (e.request.method !== 'GET') return;
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// API calls: always network, never cache
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if (url.pathname.startsWith('/api/')) return;
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// Page navigations: network-first, fallback to cache
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if (e.request.mode === 'navigate') {
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e.respondWith(
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fetch(e.request)
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.then(r => {
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const clone = r.clone();
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caches.open(CACHE).then(c => c.put(e.request, clone));
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return r;
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})
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.catch(() =>
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caches.match(e.request).then(r => r || caches.match('/login.html'))
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)
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);
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return;
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}
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// Static assets: cache-first, populate on miss
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e.respondWith(
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caches.match(e.request).then(cached => {
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if (cached) return cached;
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return fetch(e.request).then(r => {
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if (r.ok) {
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const clone = r.clone();
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caches.open(CACHE).then(c => c.put(e.request, clone));
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}
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return r;
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});
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})
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);
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});
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