Cannot read property 'connect' of undefined

[rebecabordini]

I am facing a problem trying to initialize the EventSource.

componentDidMount() {
    this.source = new EventSource("url_to_my_channel");

    this.source.onopen = () => console.log("EventSource::Connection open");

    this.source.onmessage = (message) => console.log("EventSource::onMessage", message);

    this.source.onerror = (error) => console.log("EventSource::error", error);

    this.source.addEventListener("custom_event", (event) => console.log("EventSource::custom_event", event))
  }

I am using this implementation of Push Stream.