sw.js

1	/**
2	* The service worker that makes the game installable and playable offline (user request,
3	* 2026-10-23). Network first: online, every request goes to the network as usual (so a new
4	* deploy is picked up at once) and a copy is kept; offline, the copy is used. Only this site's
5	* own GET requests are touched. Registered by main.ts in the built game only.
6	*/
7	const CACHE = 'explodorama'
8
9	self.addEventListener('install', () => self.skipWaiting())
10	self.addEventListener('activate', (e) => e.waitUntil(self.clients.claim()))
11
12	self.addEventListener('fetch', (e) => {
13	const request = e.request
14	if (request.method !== 'GET' \|\| new URL(request.url).origin !== self.location.origin) return
15	e.respondWith(
16	fetch(request)
17	.then((response) => {
18	if (response.ok) {
19	const copy = response.clone()
20	e.waitUntil(caches.open(CACHE).then((cache) => cache.put(request, copy)))
21	}
22	return response
23	})
24	.catch(() => caches.match(request).then((cached) => cached ?? Response.error())),
25	)
26	})