Initial commit

public/sw.js

@@ -0,0 +1,45 @@
+const CACHE_NAME = "rave-budget-control-v1";
+const APP_SHELL = ["/", "/login", "/icon.svg", "/manifest.webmanifest"];
+
+self.addEventListener("install", (event) => {
+  event.waitUntil(
+    caches
+      .open(CACHE_NAME)
+      .then((cache) => cache.addAll(APP_SHELL))
+      .then(() => self.skipWaiting())
+  );
+});
+
+self.addEventListener("activate", (event) => {
+  event.waitUntil(
+    caches.keys().then((cacheNames) =>
+      Promise.all(cacheNames.filter((cacheName) => cacheName !== CACHE_NAME).map((cacheName) => caches.delete(cacheName)))
+    )
+  );
+});
+
+self.addEventListener("fetch", (event) => {
+  const { request } = event;
+  const url = new URL(request.url);
+
+  if (request.method !== "GET" || url.pathname.startsWith("/api")) {
+    return;
+  }
+
+  event.respondWith(
+    fetch(request)
+      .then((response) => {
+        const responseClone = response.clone();
+
+        caches.open(CACHE_NAME).then((cache) => {
+          cache.put(request, responseClone);
+        });
+
+        return response;
+      })
+      .catch(async () => {
+        const cached = await caches.match(request);
+        return cached ?? caches.match("/");
+      })
+  );
+});