Incremental Static Regeneration

// Revalidate every 30 seconds
export const revalidate = 30;

export default async function Page() {
  // First build: Dynamic fetch
  // Subequent requests: Static Cache
  const data = await fetch('https://api.com/data');
  
  return (
    <main>
      <h1>{new Date().toLocaleTimeString()}</h1>
      {data.map(item => <Card key={item.id} {...item} />)}
    </main>
  );
}