使用帶有 Promises 的 redux-thunk

import 'whatwg-fetch';

function checkStatus(response) {
  if (response.status >= 200 && response.status < 300) {
    return response;
  }
  const error = new Error(response.statusText);
  error.response = response;
  throw error;
}

function parseJSON(response) {
  return response.json();
}

function getJSON(endpoint, params) {
  return fetch(endpoint, params)
    .then(checkStatus)
    .then(parseJSON);
}

export function action() {
  return dispatch => getJSON('/example-endpoint')
    .then((result) => {
      dispatch({
        type: GET_SUCCESS,
        result,
      });
    })
    .catch((error) => {
      dispatch({ type: GET_FAILURE, error });
    });
}