Simple Node.js HTTP server with clean formatting of http address and port.

server.js

const http = require('http');

const hostname = '127.0.0.1';
const port = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World\n');
});


const format = (address) => {
  if (!address || !address.address) {
    throw new TypeError('Invalid input.')
  }

  return (address.family === 'IPv6')
    ? `[${address.address}]:${address.port}`
    : `${address.address}:${address.port}`
}

server.listen(port, hostname, () => {
  console.log(`Server running at http://${format(server.address())}/`);
});