service-worker.js

const CACHE_NAME = "pomodoro-cache-v1";
const urlsToCache = [
  "./",
  "./index.html",
  "./manifest.json",
  "./icons/icon-192x192.png",
  "./icons/icon-512x512.png",
  "./style.css", // 确保 CSS 也被缓存
  "./script.js", // 确保 JS 也被缓存
];

// 安装 Service Worker 并缓存资源
self.addEventListener("install", (event) => {
  event.waitUntil(
    caches
      .open(CACHE_NAME)
      .then((cache) => cache.addAll(urlsToCache))
      .then(self.skipWaiting()),
  );
});

// 拦截请求，使用缓存
self.addEventListener("fetch", (event) => {
  event.respondWith(
    caches
      .match(event.request)
      .then((response) => response || fetch(event.request)),
  );
});

// 更新 Service Worker
self.addEventListener("activate", (event) => {
  event.waitUntil(
    caches.keys().then((cacheNames) => {
      return Promise.all(
        cacheNames
          .filter((name) => name !== CACHE_NAME)
          .map((name) => caches.delete(name)),
      );
    }),
  );
});