Caching with HttpInterceptor in Angular

HttpInterceptor is a powerful feature in Angular that allows developers to cache HTTP requests, which optimizes application performance by reducing redundant data retrieval from the server. This tutorial explains the process of setting up an HttpInterceptor to manage cache, particularly for GET requests, while explaining the reasons for not caching POST, PUT, and DELETE requests due to their data-altering nature. It demonstrates how to intercept HTTP requests, check if they are cached, and either return the cached response or make a new server request before caching the new response. Additionally, it discusses methods to handle stale data by resetting the cache when necessary, using techniques such as headers with reset parameters. The tutorial emphasizes the efficiency and reduced code complexity offered by Angular's Interceptors compared to other frameworks like React, Vue.js, and Svelte, and highlights tools like LogRocket for enhanced debugging and user experience monitoring in Angular applications.