async action using redux-thunk

const loadMeme = () =>
  async(dispatch) => {
    let result;
    dispatch({
      type: 'MEME_LOADING',
    });
    const offset = store.getState().meme.offset;
    try {
      result = await fetchMeme(offset);  // promise
    } catch (e) {
      return dispatch({
        type: 'MEME_FAIL',
      });
    };
    dispatch({
      type: 'MEME_APPEND',
      list: result.list,
      offset: result.offset,
    });
  };