Servers with Node

Simple HTTP servers with Node and Express-

Two Lines

import express from 'express'
const app = express().get('/', req => res.send("Hey world")).listen(3000, () => console.log("Listening on port 3000"))

Four lines

import express from 'express'
const app = express()
app.get('/', req => res.send("Hey world"))
app.listen(3000, () => console.log("Listening on port 3000"))

Don’t forget your packages and package.json:

npm init -y
npm install express

Modify your package.json so that it has

"type": "module"

Otherwise just use the require syntax to import express:

const express = require('express')

Node app without express

Express is very nice, but if you didn’t even want to use npm at all, you can do all of this using just Node.

import http from 'http';
 
http.createServer((req, res) => {
  if (req.method === 'GET' && req.url === '/') {
    res.end('Hey world');
  } else {
    res.statusCode = 404;
    res.end('Not Found');
  }
}).listen(3000, () => console.log('Listening on port 3000'));