Event Types in Node Js

Sr.No.
Events & Description
1
newListener
1. event − String: the event name
2. listener − Function: the event handler function
This event is emitted any time a listener is added. When this event is triggered, the listener may not yet have been added to the array of listeners for the event.
2
removeListener
1. event − String The event name
2. listener − Function The event handler function
This event is emitted any time someone removes a listener.
When this event is triggered, the listener may not yet have been
removed from the array of listeners for the event.
emitter.removeListener(event, listener)
Remove a listener from the listener array for the specified event. 
Caution:
changes array indices in the listener array behind the listener.

var callback = function(stream) {
console.log('someone connected!');
};
server.on('connection', callback);
server.removeListener('connection', callback);
emitter.removeAllListeners([event])

Removes all listeners, or those of the specified event.