diff --git a/static/js/sw.js b/static/js/sw.js
new file mode 100644
index 0000000..778550b
--- /dev/null
+++ b/static/js/sw.js
@@ -0,0 +1,30 @@
+"use strict";
+
+// used so I can prompt updates to the service worker
+const version = "09-01-2025";
+
+const cache = new Cache();
+
+self.addEventListener("install", (event) => {
+    // can't add /static/* due to demos living there
+    cache.addAll([
+        "/",
+        "/index.html",
+        "/static/css/*",
+        "/static/js/*",
+        "/static/images/*",
+        "/static/video/*"
+    ]);
+});
+
+async function handleCache(event) {
+    const cache_value = await cache.match(event.request);
+    if (cache_value === undefined) {
+        return fetch(event.request);
+    }
+    return cache_value;
+}
+
+self.addEventListener("fetch", async (event) => {
+    event.respondWith(handleCache(event));
+});