gistfile1.txt

class App extends React.Component {
  constructor(props) {
    super(props)
  }

  componentDidMount() {
    let es = new EventSource('/stream')
    es.onmessage = e => {
      console.log(e.data)
    }
  }
  
  render() {
    return <div>testing</div>
  }
}

// error: The connection to http://localhost:3000/stream was interrupted while the page was loading.