← Node.js & Express learning pathNode.js & Express · Module 5 of 10
Express basics
Build web servers and APIs quickly with Express.
📖 Key ideas
- const app = express(); app.listen(3000).
- Routes: app.get("/", (req, res) => res.send("Hi")).
- req holds the request; res sends the response.
- res.json(obj) sends JSON.
- express.static("public") serves files.
💡 Real-life example: Express is a receptionist desk: it reads each visitor's request and directs them to the right room.
ExpressMinimal Node web framework
RouteMethod + path + handler
reqIncoming request object
resResponse object