React Server Components: How to Think About the Server/Client Boundary

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React Server Components (RSC) introduce a new architectural dimension to frontend development by shifting the key question from how components render to where their code should execute. Server Components handle UI that requires no browser interactivity, while Client Components are reserved for elements needing state, event handlers, or browser APIs. Developers are advised to default to Server Components and only introduce Client Components when genuinely necessary, rather than treating 'use client' as a starting point. This intentional boundary influences how much JavaScript is sent to the browser, how data fetching is structured, and overall rendering performance. However, RSC is not a standalone performance fix and still requires sound strategies for caching, data fetching, and asset management to be effective.

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