node.js fetch get

fetch.js

const fetch = url => new Promise((resolve, reject) => {
  https.get(url, res => {
    res.setEncoding('utf8');
    let result = null;
    res.on('data', data => {
      result = JSON.parse(data);
    });
    res.on('end', () => {
      if (res.statusCode != 200) {
        reject("Error code " + res.statusCode);
      } else {
        resolve(result);
      }
    });
  }).on('error', error => {
    reject(error);
  });
});