当轨道ID异步获取时，ReactGa进行初始化

Question

我正在使用react-ga通过Google Analytics（分析）跟踪我的React应用。我正在通过API调用获取跟踪ID，大约4秒钟后返回。我的职能是这样：

const withTracker = (WrappedComponent, options = {}) => {
  const trackPage = (page) => {
    ReactGA.set({
      page,
      options
    });
    ReactGA.pageview(page);
  };

  class HOC extends Component {
    componentDidMount() {
      ReactGA.initialize(this.props.partnerTrackingCode);
      const page = this.props.location.pathname;
      trackPage(page);
    }

    componentWillReceiveProps(nextProps) {
      console.log(nextProps);
      const currentPage = this.props.location.pathname;
      const nextPage = nextProps.location.pathname;

      if (currentPage !== nextPage) {
        trackPage(nextPage);
      }
    }

    render() {
      return <WrappedComponent {...this.props} />;
    }
  }

  return HOC;
};

export default withTracker;

问题在于，必须首先调用initiliaze函数，并使用undefined对其进行调用，因为起初，trackid是undefined（请记住以异步方式获取）。我使用了此编辑：

const withTracker = (WrappedComponent, options = {}) => {
      const trackPage = (page) => {
        ReactGA.set({
          page,
          options
        });
        ReactGA.pageview(page);
      };

      class HOC extends Component {
        componentWillReceiveProps(nextProps) {
          if(nextProps.trackId) {
            ReactGA.initiliaze(nextProps.trackId);
            const currentPage = this.props.location.pathname;
            const nextPage = nextProps.location.pathname;
            trackPage(nextPage);
         }
        }

        render() {
          return <WrappedComponent {...this.props} />;
        }
      }

      return HOC;
    };

但是我遇到一个错误，无法读取未定义的属性parentNode 你有什么想法做什么？