sw-activate.js

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