60 lines
1.4 KiB
JavaScript
60 lines
1.4 KiB
JavaScript
// posimai-sc SW — same-origin の静的資産のみキャッシュ（CDN は対象外）
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const CACHE = 'posimai-sc-v5';
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const STATIC = [
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'/',
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'/index.html',
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'/manifest.json',
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'/logo.png',
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'/js/app.js',
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'/js/data/drills.js',
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'/js/data/categories.js'
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];
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self.addEventListener('install', e => {
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e.waitUntil(
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Promise.all([
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caches.open(CACHE).then(c =>
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c.addAll(
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STATIC.filter(u => {
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try {
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new URL(u, self.location.origin);
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return true;
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} catch {
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return false;
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}
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})
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)
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),
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self.skipWaiting()
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])
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);
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});
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self.addEventListener('activate', e => {
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e.waitUntil(
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caches
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.keys()
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.then(keys => Promise.all(keys.filter(k => k !== CACHE).map(k => caches.delete(k))))
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.then(() => self.clients.claim())
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);
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});
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self.addEventListener('fetch', e => {
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if (e.request.method !== 'GET') return;
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if (!e.request.url.startsWith(self.location.origin)) return;
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e.respondWith(
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caches.open(CACHE).then(cache =>
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cache.match(e.request).then(cached => {
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const network = fetch(e.request)
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.then(res => {
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if (res.ok && res.type === 'basic') cache.put(e.request, res.clone());
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return res;
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})
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.catch(() => cached || new Response('Offline', { status: 503, statusText: 'Service Unavailable' }));
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return cached || network;
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})
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)
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);
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});
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