Production checklist

Last reviewed May 28, 2026 Content v20260528

Track mode

client_nextjs

Means

In-browser Next.js (client components)

Reading

~1 min

Level

advanced

This lesson

This lesson teaches Production checklist: the concepts, APIs, and habits you need before advancing in Next.js.

Lists without stable keys break focus, animation, and state in production tables and feeds.

You will apply Production checklist in contexts like: Product grids, notification feeds, and searchable result lists.

Write TSX for Client Components, click Run—React 18 CDN + in-browser TSX compile; use client/server lessons explain App Router concepts; mountApp renders interactive UI; printOutput feeds the terminal.

When hooks, state, and effects from intermediate lessons are familiar.

Before shipping a Next.js app, walk through this checklist—many incidents are env vars, cache surprises, or auth gaps rather than React bugs.

Security

Secrets only in server env (no NEXT_PUBLIC_ leaks)
Authorize every Server Action and Route Handler
Validate and sanitize all user input
Secure cookies: httpOnly, secure, sameSite

Performance & UX

Core Web Vitals on key templates
Images sized and prioritized correctly
Loading and error UI on slow/critical routes
Metadata and OG tags on public pages

Operations

Preview deployments and rollback plan
Error and performance monitoring
Documented env vars per environment
Health checks if self-hosting Node

Self-check

Which item on this list has burned you—or a team—before?
How would you verify cache behavior after deploy?

Playground

Runs in your browser in a sandboxed frame. Backend runners appear when this track’s profile allows them.

Discussion

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Starter discussion topics

Pre-deploy checks?
Env vars verified?

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