111 lines
3.3 KiB
JavaScript
111 lines
3.3 KiB
JavaScript
const CACHE_NAME = 'coppertone-cache-v4';
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const urlsToCache = [
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'/',
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'/index.html',
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'/favicon.ico',
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];
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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).then((cache) => {
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// Only cache what exists, ignore failures
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return Promise.allSettled(urlsToCache.map(url => cache.add(url)));
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})
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);
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});
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self.addEventListener('fetch', (event) => {
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// Skip non-GET requests and chrome-extension URLs
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if (event.request.method !== 'GET' || event.request.url.startsWith('chrome-extension://')) {
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return;
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}
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// Skip API requests - let them go directly to network
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if (event.request.url.includes('/api/')) {
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return;
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}
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// Network-first strategy for JS/CSS assets (hashed filenames change on rebuild)
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if (event.request.url.includes('/assets/')) {
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event.respondWith(
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fetch(event.request)
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.then((response) => {
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// Clone and cache successful responses
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if (response.ok) {
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const responseClone = response.clone();
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caches.open(CACHE_NAME).then((cache) => 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((cachedResponse) => {
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// Always return a valid Response - never undefined
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return cachedResponse || new Response('Asset not available offline', {
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status: 503,
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statusText: 'Service Unavailable',
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headers: { 'Content-Type': 'text/plain' }
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});
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});
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})
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);
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return;
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}
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// Cache-first for static assets
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event.respondWith(
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caches.match(event.request).then((response) => {
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if (response) return response;
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return fetch(event.request)
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.then((networkResponse) => {
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// Cache successful responses for static content
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if (networkResponse.ok && !event.request.url.includes('/api/')) {
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const responseClone = networkResponse.clone();
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caches.open(CACHE_NAME).then((cache) => cache.put(event.request, responseClone));
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}
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return networkResponse;
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})
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.catch(() => {
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// Return a fallback for navigation requests
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if (event.request.mode === 'navigate') {
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return caches.match('/index.html').then((cachedIndex) => {
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return cachedIndex || new Response('Page not available offline', {
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status: 503,
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statusText: 'Service Unavailable',
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headers: { 'Content-Type': 'text/html' }
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});
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});
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}
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return new Response('Network error', {
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status: 503,
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statusText: 'Service Unavailable',
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headers: { 'Content-Type': 'text/plain' }
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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.addEventListener('activate', (event) => {
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// Claim clients immediately
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event.waitUntil(
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Promise.all([
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self.clients.claim(),
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// Clear old caches
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caches.keys().then((cacheNames) =>
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Promise.all(
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cacheNames.map((cacheName) => {
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if (cacheName !== CACHE_NAME) {
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return caches.delete(cacheName);
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}
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return undefined;
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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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