Next.js · Route Handlers · Fresh / Intern · Concept
What are Route Handlers in the App Router?
Short Interview Answer
`route.ts` files exporting HTTP method functions to build API endpoints.
Detailed Explanation
They replace many Pages API routes. Can run on Node or Edge runtime. Good for webhooks, auth callbacks, and JSON APIs colocated with the app.
Example
export async function GET(request: Request) {
return Response.json({ ok: true });
}