Why Express?
Express is a minimal, unopinionated web framework that sits on top of the http module, adding routing, middleware, and convenient request/response helpers — replacing all the manual boilerplate seen in the previous lessons.
Installing and Starting an Express App
npm install expressA Minimal Express Server
Console Output
Click “Run” to see the console output here.
Express vs Raw http
| Raw http | Express |
|---|---|
| Manual req.url/req.method checks | app.get(), app.post(), etc. with path patterns |
| Manual body stream reading | express.json() middleware parses it automatically |
| No built-in middleware concept | A rich middleware ecosystem for logging, auth, CORS, etc. |
res Helper Methods
Console Output
Click “Run” to see the console output here.
"Unopinionated" by Design
Unlike some frameworks (NestJS, Rails), Express doesn't enforce a particular project structure, ORM, or architecture — it gives you routing and middleware primitives, and you (or your team's conventions) decide everything else.
Best Practice
Even experienced Node.js developers rarely write raw http servers day-to-day — Express (or a similar framework) is the practical default for building APIs, precisely because it eliminates so much repetitive boilerplate.