21 lines
647 B
JavaScript
21 lines
647 B
JavaScript
self.addEventListener('install', event => {
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self.skipWaiting();
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});
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self.addEventListener('activate', event => {
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event.waitUntil(self.clients.claim());
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});
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self.addEventListener('fetch', event => {
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// Only intercept same-origin requests. Cross-origin fetches (external APIs,
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// CDNs) must go straight to the network — routing them through the SW causes
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// the browser to see duplicate CORS headers and reject the response.
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if (new URL(event.request.url).origin !== self.location.origin) return;
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event.respondWith(
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caches.match(event.request).then(response => {
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return response || fetch(event.request);
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})
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);
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});
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