@zalando/zally-web-ui/src/client/app/services/fetch.js

Zally API Linter Web UI

function handleResponse(response) {
  if (response.status >= 400) {
    const error = new Error(response.statusText || response.status);
    error.status = response.status;
    return Promise.reject(error);
  }

  return Promise.resolve(response);
}

export default function() {
  return fetch.apply(null, arguments).then(handleResponse);
}