You can use the catchall-event * to listen for all events or to trigger all callbacks respectively.
channel.on('*', function () {
// this function will get called whenever *any* event is emitted
});Registering a callback for the special event type * will cause it to get executed everytime any event is emitted. This might be useful for stuff like logging events.
channel.emit('*');Emitting the special event type * will trigger all callbacks for all events on the channel.