title: Architecting Next.js 14 Apps: When to Use Server Components vs. Client Components date: 2026-04-02T06:14:07.518Z description: Blog about Architecting Next.js 14 Apps: When to Use Server Components vs. Client Components

Hey everyone, I’m Prashuk. If you’ve been following my work, you know I’m all about building stuff that actually works in production rather than just reading documentation all day.

Lately, I’ve been deep-diving into Next.js 14. When the App Router first dropped, I’ll be honest—I was frustrated. The whole "Server vs. Client" component thing felt like extra homework. But after shiping a few projects, I’ve realized it’s actually a superpower for performance if you stop overthinking it.

Here is how I approach it in my real-world projects.

1. The "Server by Default" Rule

In Next.js 14, everything is a Server Component by default. My rule of thumb? Keep it that way until you physically can't.

In one of my recent projects—a high-traffic portfolio site—I kept almost the entire landing page as Server Components. Why? Because I wanted the SEO to be perfect and the JS bundle to be near zero. If you're just fetching data from an API or database and displaying it, you don't need a single line of client-side React.

What worked for me was focusing on the "Data In, HTML Out" mindset. If the user doesn't need to click a toggle or type in a box, keep it on the server.

2. When I’m Forced to use Client Components

I ran into this issue when I was building a dashboard for a SaaS tool. I tried to do everything on the server, but the moment I needed a simple "Show Password" toggle or a live search filter, the console started screaming at me.

You need 'use client' when:

• You use hooks like useState or useEffect.
• You need browser APIs (like localStorage or window).
• You have complex event listeners (like onClick for something other than a link).

But here's the trick: I don't make the whole page a Client Component. I just isolate the tiny part that needs interactivity.

3. The "Composition" Strategy (Clean Code)

One thing I care about is clean code. I hate seeing a 500-line file with 'use client' at the top. It feels lazy.

Instead, I use the "Leaf Component" approach. I keep the layout and heavy data fetching on the server and only push the interactivity to the "leaves" of the component tree.

For example, on a product page:

• Server: Navbar, Product Title, Description, Related Products.
• Client: The "Add to Cart" button.

4. Real-world Code Pattern

Here’s a quick look at how I structured a search feature recently. I kept the page on the server and only made the input field a client component.

// SearchInput.tsx (Client Component)
'use client';

import { useState } from 'react';

export default function SearchInput() {
  const [query, setQuery] = useState('');
  
  return (
    <input 
      value={query} 
      onChange={(e) => setQuery(e.target.value)} 
      placeholder="Search projects..."
      className="border p-2 rounded"
    />
  );
}

// Page.tsx (Server Component)
import SearchInput from './SearchInput';
import ProjectList from './ProjectList';

export default async function Page() {
  // Fetching data directly on the server
  const projects = await db.projects.findMany(); 

  return (
    <main>
      <h1>My Work</h1>
      <SearchInput /> {/* Client logic lives here */}
      <ProjectList data={projects} /> {/* Pure display on server */}
    </main>
  );
}

5. My Opinionated Best Practices

If you want your app to feel snappy and your code to stay maintainable, follow these:

• Don't put 'use client' at the page level. It defeats the whole purpose of Next.js 14. Move it down to the smallest possible component.
• Fetch data in Server Components. It’s just easier. No more loading states in useEffect or messy fetch calls in the browser.
• Pass "Server" to "Client" via Props. You can fetch data on the server and pass it down as props to a client component. Just make sure the data is "serializable" (no functions or complex classes).
• Use Suspense for UI. Instead of managing if (loading) in the client, use Next.js loading files or Suspense boundaries. It looks way more professional.

Conclusion: What I’ve Learned

The biggest takeaway from my last three months of development is that Server Components are for performance, and Client Components are for experience.

When I stopped fighting the architecture and started embracing the "Server-first" mentality, my apps got faster and my bundle sizes dropped by nearly 40%. It’s not about following the rules—it’s about making the app feel instant for the user.

What’s your biggest headache with Next.js 14 right now? Let’s talk in the comments. Keep building!