78 lines
No EOL
2.2 KiB
JavaScript
78 lines
No EOL
2.2 KiB
JavaScript
const CACHE_NAME = 'browser-notepad-v1';
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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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'https://radical.omar-c29.workers.dev/memes/fry.png',
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'https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@400;700&display=swap',
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'https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap',
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'https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swap',
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'https://fonts.googleapis.com/css2?family=Courier+Prime&display=swap'
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];
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// Install event - cache assets
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self.addEventListener('install', event => {
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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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return cache.addAll(urlsToCache);
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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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const cacheWhitelist = [CACHE_NAME];
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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 (cacheWhitelist.indexOf(cacheName) === -1) {
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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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});
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// Fetch event - serve cached content when offline
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self.addEventListener('fetch', event => {
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event.respondWith(
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caches.match(event.request)
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.then(response => {
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// Cache hit - return response
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if (response) {
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return response;
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}
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// Clone the request
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const fetchRequest = event.request.clone();
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return fetch(fetchRequest).then(
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response => {
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// Check if we received a valid response
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if(!response || response.status !== 200 || response.type !== 'basic') {
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return response;
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}
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// Clone the response
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const responseToCache = response.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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return response;
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}
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).catch(() => {
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// If fetch fails (offline), try to return the cached HTML
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if (event.request.mode === 'navigate') {
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return caches.match('./index.html');
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}
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});
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})
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);
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}); |