Dynamic Rendering vs Static Rendering Triggers

1// app/marketing/page.tsx
2// 1. Force Next.js to fail the build if any dynamic function is introduced
3export const dynamic = 'error';
4
5// If someone tries to use cookies() or headers() here, the build throws:
6// "Error: Page couldn't be rendered statically because it used cookies()"
7
8export default async function StaticMarketingPage() {
9  const content = await fetch('https://api.cms.com/marketing', {
10    next: { revalidate: 86400 } // 24-hour ISR
11  }).then(res => res.json());
12
13  return (
14    <main>
15      <h1>{content.headline}</h1>
16      <p>{content.body}</p>
17    </main>
18  );
19}