A Production Readiness Checklist for React Apps
Before shipping a React app to real users, run through this production readiness checklist.
A Production Readiness Checklist for React Apps
Before shipping a React app to real users, run through this production readiness checklist.
Production Build
Run npm run build and confirm it succeeds with no errors. The production build is what users get, not your dev bundle.
Bundle Size
Check the bundle size in the build output. Lazy-load heavy routes with React.lazy. Replace or remove heavy libraries if the bundle is too large.
Environment Variables
All config and secrets are in environment variables. Production values are set in the hosting dashboard. No secrets in code.
Error Boundaries
Error boundaries wrap the app so an unhandled error shows a fallback instead of a blank screen.
Loading and Error States
Every fetch shows a loading state and handles errors. No blank screens anywhere. Every interaction gives feedback.
Auth and Protected Routes
Auth works in production, authorized domains are configured, and protected routes redirect correctly. Test the full auth flow on the deployed app.
Responsive and Accessible
Test on mobile and desktop. Buttons have accessible names, modals trap focus, images have alt text, and color contrast is sufficient.
SEO and Metadata
The title and meta description are set. Open Graph tags are present for sharing. For SEO-critical content, ensure it can be crawled.
The Takeaway
Before shipping, check the production build, bundle size, environment variables, error boundaries, loading and error states, auth, responsiveness, accessibility, and SEO. This is the difference between a personal project and a real product.
Production build succeeds, bundle size is reasonable, environment variables are set, error boundaries wrap the app, loading and error states are everywhere, auth works in production, the app is responsive and accessible, and SEO metadata is set.
Because the production build is what users get, not your dev bundle. Run npm run build and confirm it succeeds with no errors. A build that fails or has errors in production is worse than in development.
Because an unhandled error in production shows a blank screen, which is a terrible user experience. Error boundaries wrap the app so an error shows a fallback instead, letting users recover or report the issue.
Test the full flow on the deployed app: signup, signin, signout, protected route access, and persistence across reloads. Confirm authorized domains are configured so auth redirects work in production, not just on localhost.
Look at the build output, which reports the bundle size. Lazy-load heavy routes with React.lazy to keep the initial bundle small, and run a bundle analyzer to find large dependencies that could be replaced or removed.
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