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Created Jan 28, 2022
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Fetch event of service worker
// Runs whenever there is a fetch request
self.addEventListener("fetch", (event) => {
// Checks the cache to find matching request.
// If there is a cached version of the request, it returns the cached version, otherwise it makes a new request.
caches.match(event.request).then((res) => {
return res || fetch(event.request);
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