Answers for "nodejs express server route parameters"

express js example

//to run : node filename.js
const express = require('express')
const app = express()
const port = 3000

app.get('/', (req, res) => res.send('Hello World!'))

app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))

//visit localhost:3000
// assuming you have done 1) npm init 2) npm install express

node express dynamic route and error handler

app.use(function (req, res, next) {
  res.status(404).send("Sorry can't find that!")
})