const http = require('http');

const server = http.createServer((req, res) => {
  const { url } = req;

  if (url === '/html') {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.end('<h1>Welcome to the HTML response</h1>');
  } else if (url === '/json') {
    res.writeHead(200, { 'Content-Type': 'application/json' });
    res.end(JSON.stringify({ message: 'This is a JSON response', status: 'success' }));
  } else if (url === '/text') {
    res.writeHead(200, { 'Content-Type': 'text/plain' });
    res.end('This is a plain text response.');
  } else if (url === '/js') {
    res.writeHead(200, { 'Content-Type': 'application/javascript' });
    res.end('console.log("JavaScript response from server");');
  } else {
    res.writeHead(404, { 'Content-Type': 'text/plain' });
    res.end('Resource not found');
  }
});

server.listen(3000, () => {
  console.log('Server running at http://localhost:3000');
});