Understanding React Server Components

React Server Components represent a fundamental shift in how we think about building React applications. Let's explore what they are and why they matter.

What Are Server Components?

Server Components are React components that run exclusively on the server. They never send JavaScript to the client, resulting in smaller bundle sizes and faster initial page loads.

Benefits

Zero Bundle Size

Server Components don't add to your JavaScript bundle. This means faster load times and better performance, especially on slower networks.

Direct Backend Access

You can directly access databases, file systems, and other backend resources without creating API endpoints.

Automatic Code Splitting

React automatically splits your code at Server Component boundaries, optimizing what gets sent to the client.

Client vs Server Components

// Server Component (default)
async function BlogPost({ id }) {
  const post = await db.post.findUnique({ where: { id } })
  return <article>{post.content}</article>
}

// Client Component
'use client'
function LikeButton() {
  const [liked, setLiked] = useState(false)
  return <button onClick={() => setLiked(!liked)}>Like</button>
}

Best Practices

1. Use Server Components by default
2. Only use Client Components when you need interactivity
3. Keep Client Components small and focused
4. Pass data from Server to Client Components via props

Server Components are the future of React, enabling better performance and developer experience.