ARTPresenceAction

A member is not present in the channel.

When subscribing to presence events on a channel that already has members present, this event is emitted for every member already present on the channel before the subscribe listener was registered.

A new member has entered the channel.

A member who was present has now left the channel. This may be a result of an explicit request to leave or implicitly when detaching from the channel. Alternatively, if a member’s connection is abruptly disconnected and they do not resume their connection within a minute, Ably treats this as a leave event as the client is no longer present.

An already present member has updated their member data. Being notified of member data updates can be very useful, for example, it can be used to update the status of a user when they are typing a message.