diff --git a/public/sw.js b/public/sw.js
index 5a0a784..91da8c5 100644
--- a/public/sw.js
+++ b/public/sw.js
@@ -35,6 +35,16 @@ self.addEventListener("activate", function (event) {
   return self.clients.claim();
 });
 
+function trimCache(cacheName, maxItems) {
+  caches.open(cacheName).then((cache) => {
+    return cache.keys().then((keys) => {
+      if (keys.length > maxItems) {
+        cache.delete(keys[0]).then(() => trimCache(cacheName, maxItems));
+      }
+    });
+  });
+}
+
 // self.addEventListener("fetch", function (event) {
 //   event.respondWith(
 //     caches.match(event.request).then((res) => {