Open browser console

Hello

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/html');
  res.end('Hello world');
});

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

Terminal

Try Another One

import "./styles.css";

document.getElementById("app").innerHTML = `
<h1>Hello world</h1>
`;

Open Sandbox