Mutiple Listner

var events = require('events');
var emitter = new events.EventEmitter();

// using anonymous handler function
emitter.on("DoorEvent", function (ringtype) {
    console.log(ringtype);
});

emitter.emit("DoorEvent", "Ding-Dong");

// creating named handler functions
var ringBell = function () {
    console.log('Bell Ringing');
};

var openDoor = function () {
    console.log('Door Opened');
};

var closeDoor = function () {
    console.log('Door Closed');
};

emitter.on("DoorEvent", ringBell);
emitter.on("DoorEvent", openDoor);
emitter.on("DoorEvent", closeDoor);

emitter.emit('DoorEvent');


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Event Eimitter properties


var events = require('events');

function openDoor(color) {
    this.colour = color;
    console.log("Open the " + color + " door");
    events.EventEmitter.call(this);

    this.open = function () {
        this.emit('open');
    };
}

// copy all EventEmitter properties to the
openDoor.prototype.__proto__ = events.EventEmitter.prototype;

var door1 = new openDoor('blue');

door1.on('open', function () {
    console.log('Ding-Dong');
});

door1.open();


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