How do you structure middleware order in a production Express app?
Model answer
Typical order: security headers (helmet), request logging, compression, CORS, body parsers with limits, rate limiting, routes (with auth middleware where needed), a 404 handler, then the error handler last. Order matters, for example rate limiting before expensive work and the error handler after everything else.
Learn this topic
Express Middleware Explained: next(), Logging and express.json() in the course Node.js and Express: Build a Back End API from Scratch.
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