Express router.METHOD() Functions
What you’ll learn
- How to define method-specific routes in router modules.
- How mounted prefixes combine with router paths.
- How to compose middleware chains on
router.get()androuter.post(). - How to keep route modules clean and scalable.
Syntax
javascript
router.METHOD(path, handler)
router.METHOD(path, middleware1, middleware2, handler)1
Define REST-style router methods
javascript
var router = require('express').Router();
router.get('/users', function (req, res) {
res.send('List users');
});
router.post('/users', function (req, res) {
res.status(201).send('Create user');
});2
Use middleware chain in a route
javascript
function auth(req, res, next) {
if (!req.user) return res.status(401).send('Unauthorized');
next();
}
router.get('/account', auth, function (req, res) {
res.json({ id: req.user.id });
});3
Mount router with prefix
javascript
var app = require('express')();
var userRouter = require('./routes/users');
app.use('/api', userRouter);
// router path '/users/:id' becomes '/api/users/:id'⚠️ Common pitfalls
- Using the wrong HTTP method for operation semantics.
- Forgetting that mount prefixes are part of the final route URL.
- Not returning after early error responses in middleware chains.
❓ FAQ
It defines method-specific routes on an express.Router() instance, such as router.get() or router.post().
Functionality is similar, but router.METHOD() is used inside modular router files and then mounted with app.use().
Yes. You can pass middleware functions before the final route handler.
If mounted with app.use('/users', router), a router path '/:id' resolves to '/users/:id'.
Yes. It is a clean way to organize GET/POST/PUT/PATCH/DELETE handlers by feature.
Did you know?
router.METHOD() handlers keep routes modular while still following HTTP verb semantics like get, post, put, and delete.
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