Simple Nodejs http request without external dependencies

http_request.js

'use strict';

const HTTP = require('http'), 
  HTTPS = require('https'),
  PROTOCOL = {
    HTTP: 'http:',
    HTTPS: 'https:'
  };

function request (opts, data) {
  return new Promise((resolve, reject) => requestPromise({resolve, reject, opts, data}));
}

function requestPromise({resolve, reject, opts, data}) {
  const lib = opts.protocol === PROTOCOL.HTTPS ? HTTPS : HTTP,

  req = lib.request(opts, (res) => {
    if (res.statusCode < 200 || res.statusCode > 299) {
      return reject(new Error(`Status code: ${res.statusCode}`));
    }

    const body = [];
    res.on('data', (chunk) => body.push(chunk));
    res.on('end', () => resolve(body.join('')));
  });

  req.on('error', reject);

  if (data) {
    req.write(data);
  }
  req.end();
}

const data = JSON.stringify({
  name: "morpheus",
  job: "leader"
}),

options = {
  hostname: 'reqres.in',
  port: 443,
  protocol: PROTOCOL.HTTPS,
  path: '/api/users',
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Content-Length': Buffer.byteLength(data)
  }
};

request(options, data)
.then(console.log)
.catch(console.log);