https://ilovethe90s.app/sw.js

1// Minimal service worker: exists to make the app installable as a PWA.
2// v2 — intercepts as little as possible.
3//
4// IMPORTANT: only plain same-origin GET subresources are handled. POSTs
5// (sign-in/sign-up form submissions!), navigations, and cross-origin
6// requests pass through to the network untouched — naively wrapping those
7// in respondWith(fetch(...)) broke Chrome's auth redirect flow.
8//
9// Deliberately NO caching: the station is a live synchronized broadcast;
10// stale responses would break the "everyone sees the same TV" promise.
11self.addEventListener("install", () => {
12  self.skipWaiting();
13});
14
15self.addEventListener("activate", (event) => {
16  event.waitUntil(self.clients.claim());
17});
18
19self.addEventListener("fetch", (event) => {
20  const req = event.request;
21  if (req.method !== "GET") return;
22  if (req.mode === "navigate") return;
23  let sameOrigin = false;
24  try {
25    sameOrigin = new URL(req.url).origin === self.location.origin;
26  } catch {
27    return;
28  }
29  if (!sameOrigin) return;
30
31  event.respondWith(
32    fetch(req).catch(
33      () => new Response("", { status: 504, statusText: "Offline" }),
34    ),
35  );
36});