Node.js での Express.Router インスタンスの使用の詳細な説明

const express = require('express')
const router = express.Router()

router.get('/', function (req, res) {
 res.send('hello, express')
})

module.exports = router

const express = require('express')
const router = express.Router()

router.get('/:name', function (req, res) {
 res.send('hello, ' + req.params.name)
})

module.exports = router

const express = require('express');
const app = express()
const indexRouter = require('./routes/index');
const userRouter = require('./routes/users');

app.use('/', indexRouter);
app.use('/users', userRouter);

app.listen(3000);