How do you create a basic Express route handler?

Call a method like router.get() with a URL path and a callback that receives (req, res) and sends the response.

import express from 'express';
const router = express.Router();

// Handle GET requests to '/'
router.get('/', function(req, res) {
    res.send('Hello World!');
});

export default router;

Components:

1. Import Express and create a router
2. Define routes with HTTP method + path + handler
3. Export the router for use in main app

Request: GET http://localhost/hello Response: Hello World!

Multiple routes in one file:

router.get('/users', handleGetUsers);
router.post('/users', handleCreateUser);
router.get('/users/:id', handleGetUser);

Go deeper:

• Express: Routing guide — route methods, paths, :id route params, and express.Router, official docs.