Getting Started with Next.js 15

Next.js 15 brings exciting new features and improvements. In this guide, I'll walk you through the essentials of building modern web applications.

Why Next.js?

Next.js is a React framework that provides:

• Server-Side Rendering (SSR) - Better SEO and initial load performance
• Static Site Generation (SSG) - Pre-rendered pages for maximum speed
• App Router - File-based routing with layouts and loading states
• Server Components - Reduced client-side JavaScript

Setting Up Your Project

Create a new Next.js project with:

npx create-next-app@latest my-app
cd my-app
npm run dev

Project Structure

The App Router uses a file-based routing system:

app/
├── layout.tsx      # Root layout
├── page.tsx        # Home page (/)
├── about/
│   └── page.tsx    # About page (/about)
└── blog/
    ├── page.tsx    # Blog listing (/blog)
    └── [slug]/
        └── page.tsx # Dynamic blog post (/blog/my-post)

Server Components

By default, all components in the App Router are Server Components:

// This runs on the server
export default async function Page() {
  const data = await fetch('https://api.example.com/data');
  const posts = await data.json();
  
  return (
    <ul>
      {posts.map(post => (
        <li key={post.id}>{post.title}</li>
      ))}
    </ul>
  );
}

Client Components

For interactivity, use the 'use client' directive:

'use client';

import { useState } from 'react';

export default function Counter() {
  const [count, setCount] = useState(0);
  
  return (
    <button onClick={() => setCount(count + 1)}>
      Count: {count}
    </button>
  );
}

Metadata and SEO

Next.js 15 makes SEO easy with the Metadata API:

import type { Metadata } from 'next';

export const metadata: Metadata = {
  title: 'My Page Title',
  description: 'My page description',
  openGraph: {
    title: 'My Page Title',
    description: 'My page description',
  },
};

Conclusion

Next.js 15 is a powerful framework for building modern web applications. Start experimenting with these features and see how they can improve your development workflow!

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Have questions? Feel free to reach out!