integration-nextjs-app-router

You can integrate PostHog analytics into a Next.js App Router application by wiring client-side event capture via instrumentation-client.ts and using the posthog-node SDK on the server to capture events from API routes and server components.

To capture server-side events in Next.js App Router, use the posthog-node SDK to capture events from API routes and server components, ensuring you properly shut down server runners in your server endpoints to maintain serverless compatibility.

User identification links sessions across client and server by using posthog.identify on the client side during login flows and applying server-side identify methods to unify user behavior tracking across the Next.js App Router.

Yes, PostHog is compatible with Next.js 15.3+ App Router and manages client and server tracking while following serverless considerations like ensuring proper shutdown of server runners in serverless endpoints.

The best way to track user behavior across Next.js routes is combining client-side initialization via instrumentation-client.ts with the posthog-node SDK on the server to provide a unified picture of user behavior.

You need instrumentation-client.ts for PostHog event tracking in Next.js because it follows App Router patterns to bootstrap the client-side PostHog client, enabling seamless initialization and event capture across your application.