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service-worker.js
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service-worker.js
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const staticCacheKey = 'static-ph-v0.0.3';
const dynamicCacheKey = 'dynamic-ph-v0.0.3';
const preloadResources = [
// core
'index.html',
'Component-preload.js',
'/css/style.css',
// images
'/resource/image/EPAMLogo.jpg',
'/resource/image/JETBILogo.jpg',
'/resource/image/WLNCLogo.jpg',
'/resource/image/MRCLogo.jpg',
'/resource/image/School33Logo.jpg',
// data
'/resource/data/Resume/resume-en.json',
'/resource/data/Resume/resume-de.json',
'/resource/data/Resume/resume-ru.json'
];
self.addEventListener('push', (event) => {
const { title, options } = event.data.json();
const promise = self.registration.showNotification(title, options);
event.waitUntil(promise);
});
self.addEventListener('install', async () => {
const cache = await caches.open(staticCacheKey);
await cache.addAll(preloadResources);
});
self.addEventListener('activate', async () => {
const cacheKeys = await caches.keys();
await Promise.all(
cacheKeys
.filter((key) => ![staticCacheKey, dynamicCacheKey].includes(key))
.map((key) => caches.delete(key))
);
});
self.addEventListener('fetch', (event) => {
const { request } = event;
const url = new URL(request.url);
if (url.origin === location.origin) {
event.respondWith(cacheFirst(request));
} else if (request.url.startsWith('http')) {
event.respondWith(networkFirst(request, dynamicCacheKey));
}
});
async function cacheFirst(request) {
const cached = await caches.match(request);
return cached ?? (await networkFirst(request, staticCacheKey));
}
async function networkFirst(request, cacheKey) {
const cache = await caches.open(cacheKey);
try {
const response = await fetch(request);
if (request.method !== 'POST') cache.put(request, response.clone());
return response;
} catch (error) {
const cached = await cache.match(request);
return cached ?? console.error('request failed', error);
}
}