Difference between original EventSource

[ddavydov]

These is one important difference between with original EventSource
https://github.com/remy/polyfills/blob/master/EventSource.js#L95

        // don't need to poll again, because we're long-loading
        } else if (eventsource.readyState !== eventsource.CLOSED) {
          if (this.readyState == 4) { // and some other status
            // dispatch error
            eventsource.readyState = eventsource.CONNECTING;
            eventsource.dispatchEvent('error', { type: 'error' });
            pollAgain(interval);
          } else if (this.readyState == 0) { // likely aborted
            pollAgain(interval);
          } else {
          }
        }

code related to // dispatch error was not moved intentionally? In my case it's needed to catch error codes from the server.