61 lines
1.5 KiB
JavaScript
61 lines
1.5 KiB
JavaScript
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'use strict';
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const CACHE_NAME = 'baton-v1';
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// App shell assets to precache
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const APP_SHELL = [
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'/',
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'/index.html',
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'/app.js',
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'/style.css',
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'/manifest.json',
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'/icons/icon-192.png',
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'/icons/icon-512.png',
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];
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// Install: precache app shell + skipWaiting so new SW activates immediately
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self.addEventListener('install', (event) => {
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self.skipWaiting();
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event.waitUntil(
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caches.open(CACHE_NAME).then((cache) => cache.addAll(APP_SHELL))
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);
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});
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// Activate: delete stale caches + claim open clients (decision: skipWaiting + clients.claim)
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self.addEventListener('activate', (event) => {
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event.waitUntil(
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caches
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.keys()
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.then((keys) =>
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Promise.all(
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keys.filter((k) => k !== CACHE_NAME).map((k) => caches.delete(k))
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)
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)
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.then(() => self.clients.claim())
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);
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});
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// Fetch: cache-first for app shell; API calls pass through to network
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self.addEventListener('fetch', (event) => {
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if (event.request.method !== 'GET') return;
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const url = new URL(event.request.url);
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// Never intercept API calls — they must always reach the server
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if (url.pathname.startsWith('/api/')) return;
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event.respondWith(
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caches.match(event.request).then((cached) => {
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if (cached) return cached;
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return fetch(event.request).then((response) => {
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if (response && response.status === 200) {
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const clone = response.clone();
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caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
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}
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return response;
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});
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})
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);
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});
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