Incremental Static Regeneration (ISR) in Next.js

ISR is a powerful feature of Next.js that allows static pages to be updated without requiring a full rebuild. This is ideal for blogs, e-commerce sites, and other dynamic applications that need fresh content while maintaining fast performance.

Using ISR

export async function getStaticProps() {
  const res = await fetch("https://api.example.com/posts");
  const data = await res.json();
  return {
    props: { posts: data },
    revalidate: 10, // Regenerates every 10 seconds
  };
}

• Faster builds compared to full static generation.
• Ensures fresh content without the overhead of server-side rendering.

Conclusion

ISR offers the best of both worlds—speed and flexibility—making it an essential tool for delivering real-time yet performant applications.