update

serviceWorker.js

@@ -20,3 +20,20 @@ self.addEventListener("fetch", event => {
       }),
   );
 });
+
+// eslint-disable-next-line no-restricted-globals
+self.addEventListener('activate', function(e) {
+  e.waitUntil(
+    Promise.all(
+      caches.keys().then(cacheNames => {
+        return cacheNames.map(name => {
+          if (name !== cacheStorageKey) {
+            return caches.delete(name)
+          }
+        })
+      })
+    ).then(() => {
+      return self.clients.claim()
+    })
+  )
+})