react integration with other applications article

app with counter-app container

class App extends Component {

  render() {
    return (
      <div className="App">
        <header className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <div id="counter-app"></div>
          <p>
            This is the main App. 
          </p>
        </header>
      </div>
    );
  }
}