Check the status of a fetch response

checkStatus.js

/**
 * Check the status of a fetch response.
 */
export default function checkStatus(response) {
  if (response.ok) {
    return response;
  }

  const error = new Error(response.statusText);
  error.response = response;

  // If the error response is JSON, attempt to parse it.
  const contentType = response.headers.get('content-type');
  if (contentType && contentType.match('application/json')) {
    return response.json().then((json) => {
      error.data = json;
      throw error;
    }).catch(() => {
      throw error;
    });
  }

  throw error;
}