68 lines
1.9 KiB
JavaScript
68 lines
1.9 KiB
JavaScript
/* Bike-Tinder service worker.
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- Precache the app shell at install; index.html + sw.js are served with
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Cache-Control: no-cache so updates are picked up.
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- /api/* : network-first; offline -> 503 JSON (the page toasts "Offline").
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- /img/* : cache-first with network fill (mirrored thumbnails stay usable
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offline once seen).
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- Everything else (shell/navigation): network-first, fall back to cache.
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*/
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const VERSION = 'bike-tinder-v3';
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const SHELL = [
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'/',
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'/manifest.json',
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'/apple-touch-icon.png',
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'/icons/icon-192.png',
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'/icons/icon-512.png',
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'/icons/icon-512-maskable.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(VERSION)
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.then((c) => c.addAll(SHELL))
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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(keys.filter((k) => k !== VERSION).map((k) => caches.delete(k))))
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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 req = e.request;
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if (req.method !== 'GET') return;
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const url = new URL(req.url);
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if (url.pathname.startsWith('/api/')) {
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e.respondWith(
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fetch(req).catch(() => new Response(JSON.stringify({ error: 'offline' }),
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{ status: 503, headers: { 'Content-Type': 'application/json' } }))
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);
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return;
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}
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if (url.pathname.startsWith('/img/')) {
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e.respondWith(
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caches.match(req).then((hit) => hit || fetch(req).then((res) => {
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if (res.ok) {
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const clone = res.clone();
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caches.open(VERSION).then((c) => c.put(req, clone));
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}
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return res;
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}).catch(() => new Response('', { status: 404 })))
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);
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return;
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}
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// shell + navigation: network first, cache fallback (offline launch)
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e.respondWith(
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fetch(req).then((res) => res).catch(() =>
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caches.match(req).then((hit) => hit || caches.match('/'))
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)
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);
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});
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