Getting Started with React Server Components

React Server Components (RSC) represent a paradigm shift in how we build React applications. They allow components to render on the server, reducing the JavaScript bundle sent to the client.

What are Server Components?

Server Components are React components that render exclusively on the server. They can:

• Access backend resources directly (databases, file systems)
• Keep sensitive logic on the server
• Reduce client-side JavaScript bundle size

Key Benefits

1. Zero Bundle Impact: Server components are not included in the JavaScript bundle
2. Direct Backend Access: Query databases without API endpoints
3. Improved Performance: Faster initial page loads

Example

// This component runs on the server
async function BlogPosts() {
const posts = await db.query("SELECT * FROM posts");

return (
<ul>
{posts.map(post => (
<li key={post.id}>{post.title}</li>
))}
</ul>
);
}

When to Use Server vs Client Components

Use Server Components for:

• Data fetching
• Accessing backend resources
• Keeping sensitive information on server

Use Client Components for:

• Interactivity and event handlers
• Browser APIs
• State and lifecycle effects

Conclusion

React Server Components offer a powerful new model for building performant React applications. Start experimenting with them in Next.js 13+ to see the benefits firsthand.