https://operativmm.az/sw.js

1/*
2 * OperativMM service worker — deliberately small.
3 *
4 * It exists so the site qualifies as installable (manifest + SW) and so
5 * repeat visits skip re-downloading hashed build assets and static files.
6 * It never caches HTML: news must be fresh, and an offline page would only
7 * be a stale one. HTML and API calls go network-first with no fallback, so
8 * the worker can never serve yesterday's front page.
9 */
10
11const VERSION = 'omm-sw-v1';
12const STATIC_CACHE = `${VERSION}-static`;
13
14// Only these path prefixes are ever cached. Hashed Vite output under /build/
15// is immutable; /frontend/ holds fonts, logos and vendored scripts.
16const STATIC_PREFIXES = ['/build/', '/frontend/'];
17
18self.addEventListener('install', () => {
19    self.skipWaiting();
20});
21
22self.addEventListener('activate', (event) => {
23    event.waitUntil(
24        caches.keys().then((keys) =>
25            Promise.all(keys.filter((k) => k.startsWith('omm-sw-') && k !== STATIC_CACHE).map((k) => caches.delete(k)))
26        ).then(() => self.clients.claim())
27    );
28});
29
30self.addEventListener('fetch', (event) => {
31    const { request } = event;
32
33    if (request.method !== 'GET') return;
34
35    const url = new URL(request.url);
36    if (url.origin !== self.location.origin) return;
37
38    const isStatic = STATIC_PREFIXES.some((p) => url.pathname.startsWith(p));
39
40    if (isStatic) {
41        // Cache-first: hashed or rarely-changing files.
42        event.respondWith(
43            caches.open(STATIC_CACHE).then(async (cache) => {
44                const hit = await cache.match(request);
45                if (hit) return hit;
46                const res = await fetch(request);
47                if (res && res.ok) cache.put(request, res.clone());
48                return res;
49            })
50        );
51        return;
52    }
53
54    // Everything else (HTML, /api, /storage images): straight to the network.
55    // No respondWith → the browser handles it exactly as if there were no worker.
56});