Server Components render on the server with zero client JavaScript. Here's how to use them effectively.
Server vs Client Components
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When to Use Each
| Server Components | Client Components |
|---|---|
| Fetch data | Event handlers (onClick, onChange) |
| Access backend resources | useState, useEffect |
| Keep sensitive info on server | Browser APIs |
| Large dependencies | Interactivity |
Data Fetching Patterns
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Mixing Server and Client
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Passing Server Data to Client
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Streaming with Suspense
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Best Practices
- Start with Server Components - Only add 'use client' when needed
- Push client boundaries down - Keep interactive parts small
- Fetch data at the top - Pass down as props
- Use Suspense for loading states - Better UX than full page loading
Server Components reduce bundle size, improve performance, and simplify data fetching.