torvalds-GuitarPedal/WebMIDI/service-worker.js

const CACHE_NAME = 'rp2350-pedal-cache-v8';
const urlsToCache = [
  './',
  './index.html',
  './style.css',
  './app.js',
  './effects.js',
  './manifest.json',
  './icon-192.png',
  './icon-512.png'
];

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

self.addEventListener('fetch', event => {
  event.respondWith(
    fetch(event.request).then(response => {
      // Network success - update cache and return response
      if (response && response.status === 200) {
        const responseClone = response.clone();
        caches.open(CACHE_NAME).then(cache => {
          cache.put(event.request, responseClone);
        });
      }
      return response;
    }).catch(() => {
      // Network failed - fallback to cache
      return caches.match(event.request);
    })
  );
});

self.addEventListener('activate', event => {
  const cacheWhitelist = [CACHE_NAME];
  event.waitUntil(
    caches.keys().then(cacheNames => {
      return Promise.all(
        cacheNames.map(cacheName => {
          if (cacheWhitelist.indexOf(cacheName) === -1) {
            return caches.delete(cacheName);
          }
        })
      );
    })
  );
});