Http Cache

Service worker cache: The service worker checks if the resource is in its cache and decides whether to return the resource itself based on its programmed caching strategies. Note that this does not happen automatically. You need to create a fetch event handler in your service worker and intercept network requests so that the requests are served from the service worker’s cache rather than the network. HTTP cache (also known as the browser cache): If the resource is found in the HTTP Cache and has not yet expired, the browser automatically uses the resource from the HTTP cache. Server-side: If nothing is found in the service worker cache or the HTTP cache, the browser goes to the network to request the resource. If the resource isn’t cached in a CDN, the request must go all the way back to the origin server.