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This tutorial extends the SSR explained on Server-side rendering (SSR) with Angular Universal page. Our goal is to store data received from SSR and reuse them without making any network requests. We create a HttpInterceptor to intercept SSR HTP requests and store results on TransferState service. This data store is serialized and passed to the client-side with the rendered page. All the requests you do will go through this interceptor. On the above example, I save all successful HttpResponses on to the state store.