sw.js

const CACHE_NAME = "retos-cache-v1";
const FILES_TO_CACHE = [
    "./",
    "./index.html",
    "./styles.css",
    "./app.js",
    "./manifest.json"
];

self.addEventListener("install", (event) => {
    event.waitUntil(
        caches.open(CACHE_NAME).then((cache) => cache.addAll(FILES_TO_CACHE))
    );
    self.skipWaiting();
});

self.addEventListener("activate", (event) => {
    event.waitUntil(
        caches.keys().then((cacheNames) => {
            return Promise.all(
                cacheNames.map((cache) => {
                    if (cache !== CACHE_NAME) {
                        return caches.delete(cache);
                    }
                })
            );
        })
    );
    self.clients.claim();
});

self.addEventListener("fetch", (event) => {
    event.respondWith(
        caches.match(event.request).then((response) => response || fetch(event.request))
    );
});