The introduction of the App Directory (App Router) in Next.js has redefined how modern React applications are built. At the core of this architecture are Server Components and Client Components.
This article by PT Code Hero Indonesia provides a comprehensive, SEO-focused explanation for developers, tech companies, and digital businesses aiming to build fast, scalable, and search-engine-friendly applications.
What Is the App Directory?
The App Directory is Next.js’s modern routing system designed to optimize performance, improve developer experience, and embrace React Server Components by default.
- Server-first rendering strategy
- Built-in data fetching on the server
- Improved SEO and Core Web Vitals
- Scalable folder-based architecture
What Are Server Components?
Server Components are rendered entirely on the server and do not ship JavaScript to the client. This results in faster load times and improved SEO.
Benefits of Server Components
- Excellent SEO performance
- Reduced JavaScript bundle size
- Direct access to databases and APIs
- Enhanced security
What Are Client Components?
Client Components run in the browser and handle user interactions such as clicks, animations, and form submissions.
They are explicitly marked using the "use client" directive.
When to Use Client Components
- Interactive dashboards
- Dynamic forms
- Real-time UI updates
Server vs Client Components Comparison
| Aspect | Server Components | Client Components |
|---|---|---|
| Rendering | Server | Browser |
| SEO | Excellent | Limited |
| Interactivity | No | Yes |
Code Hero Best Practices
At PT Code Hero Indonesia, we implement a balanced approach: Server Components for SEO, performance, and security, combined with Client Components only where interactivity is essential.
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