initActions in root

initActions-in-root.js

export const initActions = async dispatch => {
  let updateTimeout;
  
  updateMessages = async () => {
    await dispatch(getNewMessages());
    updateTimeout = setTimeout(updateMessages, 500);
  }
  
  updateMessages();
}

class App extends React.PureComponent {
  componentDidMount() {
    this.props.initActions();
  }
  
  render() {
    return (
      <div>
        <Header />
        <Main />
        <Footer />
      </div>
    );
  }
}