Next.js Advanced
Go beyond the basics! Master Dynamic Routes, API Routes, and Layouts in Next.js.
Go beyond the basics! Master Dynamic Routes, API Routes, and Layouts in Next.js. This hands-on tutorial focuses on practical implementation of next.js advanced concepts.
Next.js Advanced
We know how to create simple pages. Now let's build a real application with dynamic content and backend logic.
1. Dynamic Routes 🔀
What if you have a blog with 100 posts? You don't want to create 100 files. You create one dynamic file.
Wrap the folder name in square brackets: [slug].
File Structure:
app/blog/[slug]/page.jsx
2. Layouts 📐
A Layout is UI that is shared between multiple pages (like a Navbar or Footer). It wraps the pages inside it.
File: app/layout.jsx (The Root Layout)
Nested Layouts:
You can create app/dashboard/layout.jsx to have a specific sidebar only for dashboard pages.
3. API Routes (Backend) 🔌
You don't need a separate Express server. You can write backend code directly in Next.js using route.js.
File: app/api/users/route.js
4. Special Files 📂
Next.js has special files to handle UI states automatically:
loading.jsx: Shows a loading spinner while the page loads.error.jsx: Shows an error message if the page crashes.not-found.jsx: Custom 404 page.
AI Mentor
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Quiz
Quiz
Question 1 of 4How do you define a dynamic route segment?
Key Takeaways
✅ [slug] creates dynamic URLs.
✅ Layouts share UI across pages.
✅ route.js builds backend APIs.
✅ loading.jsx handles loading states.
What's Next?
We have a fullstack app! But how do we manage complex state across the whole app? Next up: State Management.
Keep coding! 🚀