Next.js Cheat Sheet

app/page.tsx              -> /app/about/page.tsx        -> /aboutapp/blog/[slug]/page.tsx  -> /blog/:slugapp/layout.tsx            -> shared layout

export default async function Page() {  const res = await fetch('https://api.example.com/data', {    next: { revalidate: 60 }, // ISR every 60s  });  const data = await res.json();  return <div>{data.title}</div>;}

// app/api/hello/route.tsexport async function GET() {  return Response.json({ message: 'Hello' });}