Zenburn для Netbeans

const fakeFetch = url => {
  const xhr = () => new Promise((resolve, reject) => {
    try {
      const x = new XMLHttpRequest();
      x.onreadystatechange = function() {
        const {
          readyState,
          status
        } = this;
        if (readyState === 4 && status === 200) {
          resolve(x.responseText);
        }
      }

      x.open('get', url);
      x.send();
    } catch (e) {
      reject(e);
    }
  })

  const _fetch = () => new Promise((resolve, reject) => {
    try {
      const response = xhr();
      if (response !== undefined) resolve(response);
    } catch (e) {
      reject(e);
    }
  })

  return _fetch();
}

fakeFetch('https://api.github.com/users')
  .then(data => console.log(data));