33 lines
947 B
JavaScript
33 lines
947 B
JavaScript
const CACHE_VERSION = "3";
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self.addEventListener("fetch", (event) => {
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event.respondWith(handleRequest(event));
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});
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async function handleRequest(event) {
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const response = await getFromCache(event);
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if (response) {
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fetchAndCache(event); // Call this but don't await, allowing the cache to update in the background
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return response;
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}
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return fetchAndCache(event);
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}
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async function getFromCache(event) {
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const request = event.request;
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const cache = await caches.open(CACHE_VERSION);
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const response = await cache.match(request);
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return response;
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}
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async function fetchAndCache(event) {
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const request = event.request;
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const response = await fetch(request, { cache: "no-cache" });
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if (response.status === 200) {
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// Only cache successful responses
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const cache = await caches.open(CACHE_VERSION);
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cache.put(request, response.clone());
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}
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return response;
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}
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