Connecting: All dependencies have been loaded and Channels is trying to connect. The connection will also enter this state when it is trying to reconnect after a connection failure.
Unavailable: The connection is temporarily unavailable. In most cases this means that there is no internet connection. It could also mean that Channels is down, or some intermediary is blocking the connection. In this state, pusher-js will automatically retry the connection every 15 seconds.
See: https://pusher.com/docs/channels/using_channels/connection/#available-states