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42 lines
947 B
42 lines
947 B
3 years ago
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const CACHE_NAME = "version-1";
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const urlsToCache = ['index.html', 'offline.html'];
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const self = this;
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//Install SW
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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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//Listen for requests
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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(() => {
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return fetch(event.request)
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.catch(() => caches.match('offline.html'));
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})
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);
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});
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//Activate the SW
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self.addEventListener('activate', (event) => {
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const cacheWhiteList = [];
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cacheWhiteList.push(CACHE_NAME);
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event.waitUntil(
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caches.keys().then((cacheNames) => Promise.all(
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cacheNames.map((cacheName) => {
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if (!cacheWhiteList.includes(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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