location-redirect.js

const checkForRedirect = (response) => {
  // Check for temporary redirect (307), or permanent (308)
  if (response.status === 307 || response.status === 308) {
    const location = response.headers.get('location')
    if (!location) {
      return Promise.reject(new Error('Invalid HTTP Redirect! No Location header.'));
    }
    // You can change the behavior here to any custom logic:
    //   e.g. open a "confirm" modal, log the redirect url, etc.
    return fetch(location)
      // Bonus: this will handle recursive redirects ✨
      .then(checkForRedirect)
  }
  return response
};

fetch('https://api.github.com/orgs/elite-libs')
  // Next line will handle redirects
  .then(checkForRedirect)
  .then(response => response.json())
  .then(console.log)
  .catch(console.error)