Getting Started with Next.js 15
Next.js 15 brings powerful new features for building modern web applications. In this guide, we'll explore the fundamentals and best practices.
Why Next.js?
Next.js is a React framework that provides:
Installation
Getting started is simple:
npx create-next-app@latest my-app
cd my-app
npm run dev
App Router
The new App Router uses React Server Components by default:
// app/page.tsx
export default function Home() {
return (
<main>
<h1>Welcome to Next.js 15</h1>
</main>
);
}
Key Features
1. File-based Routing
Create routes by adding files to the app directory:
app/page.tsx → /app/about/page.tsx → /aboutapp/blog/[slug]/page.tsx → /blog/:slug2. Layouts
Share UI between routes with layouts:
// app/layout.tsx
export default function RootLayout({
children,
}: {
children: React.ReactNode;
}) {
return (
<html>
<body>
<nav>Navigation</nav>
{children}
<footer>Footer</footer>
</body>
</html>
);
}
3. Data Fetching
Fetch data directly in components:
async function getData() {
const res = await fetch('https://api.example.com/data');
return res.json();
}
export default async function Page() {
const data = await getData();
return <div>{data.title}</div>;
}
Conclusion
Next.js 15 provides everything you need to build production-ready web applications. Start building today!