5e6e3f04d3
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77 lines
2.2 KiB
JavaScript
77 lines
2.2 KiB
JavaScript
const CACHE_NAME = 'time-tracker-app-v2';
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const urlsToCache = [
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'/',
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'/index.html',
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'/manifest.json',
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'/favicon.ico',
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'/logo192.png',
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'/logo512.png'
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];
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// Install event - cache essential static assets
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self.addEventListener('install', (event) => {
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// Skip waiting to activate immediately
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self.skipWaiting();
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event.waitUntil(
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caches.open(CACHE_NAME)
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.then((cache) => {
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console.log('Opened cache');
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// Use addAll for guaranteed files. If these fail, SW won't install.
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// We omit JS/CSS because CRA uses hashed filenames in production.
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return cache.addAll(urlsToCache);
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})
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);
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});
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// Fetch event - Stale-while-revalidate strategy for most requests
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self.addEventListener('fetch', (event) => {
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// Only handle GET requests
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if (event.request.method !== 'GET') return;
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// Skip cross-origin requests
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if (!event.request.url.startsWith(self.location.origin)) return;
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event.respondWith(
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caches.match(event.request)
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.then((cachedResponse) => {
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const fetchPromise = fetch(event.request).then((networkResponse) => {
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// Dynamically cache successful GET requests
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if (networkResponse && networkResponse.status === 200) {
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const responseToCache = networkResponse.clone();
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caches.open(CACHE_NAME)
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.then((cache) => {
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cache.put(event.request, responseToCache);
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});
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}
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return networkResponse;
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}).catch(() => {
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// If network fails and we have no cache, return the cached index.html for navigation requests (SPA fallback)
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if (event.request.mode === 'navigate') {
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return caches.match('/');
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}
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});
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return cachedResponse || fetchPromise;
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})
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);
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});
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// Activate event - clean up old caches
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self.addEventListener('activate', (event) => {
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// Take control of all clients immediately
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event.waitUntil(self.clients.claim());
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event.waitUntil(
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caches.keys().then((cacheNames) => {
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return Promise.all(
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cacheNames.map((cacheName) => {
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if (cacheName !== CACHE_NAME) {
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console.log('Deleting old cache:', cacheName);
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return caches.delete(cacheName);
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}
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})
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);
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})
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);
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}); |