React Server Components Replace useEffect as the Standard for Data Fetching

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React Server Components (RSC), now stable in frameworks like Next.js App Router, allow components to run exclusively on the server, eliminating the need for client-side data fetching via useEffect. Unlike the traditional pattern of rendering a loading spinner and firing API calls from the browser, RSCs generate HTML on the server and stream it directly to the client. This approach removes client-side JavaScript overhead, improves Largest Contentful Paint (LCP) times, and enhances security by keeping API keys and database logic entirely server-side. Client components marked with 'use client' are now recommended only for interactive elements such as buttons, forms, and animations. Developers still relying heavily on useEffect for data fetching in 2026 are increasingly considered to be using an outdated approach.

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