philc
55 lines
1.6 KiB
JavaScript
55 lines
1.6 KiB
JavaScript
const CACHE_NAME = 'mynation-cache-v1';
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const PRECACHE_ASSETS = [
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'./',
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'index.html',
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'css/output.css',
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'js/app.js',
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'manifest.json'
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];
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self.addEventListener('install', function (event) {
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event.waitUntil(
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Promise.allSettled(
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PRECACHE_ASSETS.map(function (url) {
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return caches.open(CACHE_NAME).then(function (cache) {
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return fetch(url, { cache: 'no-cache' }).then(function (response) {
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if (response.ok) cache.put(url, response.clone());
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return response;
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}).catch(function () {
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return cache.match(url);
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});
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});
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})
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).then(function () { return self.skipWaiting(); })
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);
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});
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self.addEventListener('fetch', function (event) {
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if (event.request.method !== 'GET') return;
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event.respondWith(
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(async function () {
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try {
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var networkResponse = await fetch(event.request);
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if (networkResponse.ok) {
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var cache = await caches.open(CACHE_NAME);
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cache.put(event.request, networkResponse.clone());
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}
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return networkResponse;
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} catch (err) {
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var cachedResponse = await caches.match(event.request);
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return cachedResponse || new Response('Offline', { status: 503 });
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}
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})()
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);
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});
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self.addEventListener('activate', function (event) {
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event.waitUntil(
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caches.keys().then(function (cacheNames) {
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return Promise.all(
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cacheNames.filter(function (name) { return name !== CACHE_NAME; }).map(function (name) { return caches.delete(name); })
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);
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}).then(function () { return self.clients.claim(); })
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);
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});
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