What is the purpose of express.Router class?

Q: What is the purpose of express.Router class?

const express = require('express') const router = express.Router() // middleware that is specific to this router const timeLog = (req, res, next) => { console.log('Time: ', Date.now()) next() } router.use(timeLog) // define the home page route router.get('/', (req, res) => { res.send('Birds home page') }) // define the about route router.get('/about', (req, res) => { res.send('About birds') }) module.exports = router const birds = require('./birds') // ... app.use('/birds', birds)

Difficulty: 4/10

modular routing, middleware grouping, route organization

Use the express.Router class to create modular, mountable route handlers. A Router instance is a complete middleware and routing system; for this reason, it is often referred to as a “mini-app”.

The following example creates a router as a module, loads a middleware function in it, defines some routes, and mounts the router module on a path in the main app.

import and use in app

Scenario Questions

0-2 years experience

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