How do I make a https post in Node Js without any third party module?

For example, like this:

const https = require('https');

var postData = JSON.stringify({
    'msg' : 'Hello World!'
});

var options = {
  hostname: 'posttestserver.com',
  port: 443,
  path: '/post.php',
  method: 'POST',
  headers: {
       'Content-Type': 'application/x-www-form-urlencoded',
       'Content-Length': postData.length
     }
};

var req = https.request(options, (res) => {
  console.log('statusCode:', res.statusCode);
  console.log('headers:', res.headers);

  res.on('data', (d) => {
    process.stdout.write(d);
  });
});

req.on('error', (e) => {
  console.error(e);
});

req.write(postData);
req.end();

Here's a version slightly different from the accepted answer:

• async
• You can pass the URL directly (no need to split to hostname, path, port)
• It handles error HTTP status codes
• It handles connection timeouts
• For an alternative content type example, it sends JSON instead of x-www-form-urlencoded

const https = require('https')

async function post(url, data) {
  const dataString = JSON.stringify(data)

  const options = {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Content-Length': dataString.length,
    },
    timeout: 1000, // in ms
  }

  return new Promise((resolve, reject) => {
    const req = https.request(url, options, (res) => {
      if (res.statusCode < 200 || res.statusCode > 299) {
        return reject(new Error(`HTTP status code ${res.statusCode}`))
      }

      const body = []
      res.on('data', (chunk) => body.push(chunk))
      res.on('end', () => {
        const resString = Buffer.concat(body).toString()
        resolve(resString)
      })
    })

    req.on('error', (err) => {
      reject(err)
    })

    req.on('timeout', () => {
      req.destroy()
      reject(new Error('Request time out'))
    })

    req.write(dataString)
    req.end()
  })
}

const res = await post('https://...', data)