84 lines
2.4 KiB
JavaScript
84 lines
2.4 KiB
JavaScript
// service-worker.js
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// Cache-Strategie: Cache First (offline works, then network)
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const CACHE_NAME = 'roll-calculator-v3'; // bumped to v2 for new clearance settings
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const ASSETS_TO_CACHE = [
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'./',
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'./roll_calculator_v9.html',
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'./article-data.json',
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'./config.json',
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'./service-worker.js'
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];
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// Install Event
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self.addEventListener('install', event => {
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console.log('[ServiceWorker] Installing...');
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event.waitUntil(
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caches.open(CACHE_NAME).then(cache => {
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console.log('[ServiceWorker] Caching assets:', ASSETS_TO_CACHE);
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return cache.addAll(ASSETS_TO_CACHE);
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}).catch(err => {
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console.error('[ServiceWorker] Cache failed:', err);
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})
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);
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self.skipWaiting();
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});
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// Activate Event: Cleanup alte Caches
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self.addEventListener('activate', event => {
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console.log('[ServiceWorker] Activating...');
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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('[ServiceWorker] 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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self.clients.claim();
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});
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// Fetch Event: Cache First Strategy
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self.addEventListener('fetch', event => {
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const url = event.request.url;
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if (event.request.method !== 'GET') return;
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event.respondWith(
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caches.match(event.request)
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.then(response => {
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if (response) {
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console.log('[ServiceWorker] Cache HIT:', url);
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return response;
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}
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console.log('[ServiceWorker] Cache MISS, fetching:', url);
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return fetch(event.request)
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.then(response => {
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if (!response || response.status !== 200 || response.type === 'error') {
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return response;
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}
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const responseClone = response.clone();
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caches.open(CACHE_NAME).then(cache => {
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cache.put(event.request, responseClone);
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});
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return response;
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})
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.catch(() => {
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return caches.match(event.request).then(response => {
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if (response) return response;
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return new Response('Offline - resource not available', {
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status: 503,
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statusText: 'Service Unavailable'
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});
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});
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});
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})
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);
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});
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console.log('[ServiceWorker] Script loaded (v2)');
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