emitter.addListener(eventName, listener): Add listener to this event

emitter.addListener(eventName, listener)

This function add listener to this event.

Below table summarizes the arguments of addListener function.

Argument	Type	Description
eventName	String	Event name
Listener	Function	Callback function to be called on this event emit

HelloWorld.js

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

var emitter = new EventEmitter();

emitter.addListener("welcome", (name) => {
 console.log("Hello Mr.%s", name);
});

emitter.addListener("welcome", (name) => {
 console.log("Good Morning Mr.%s", name);
});

emitter.emit("welcome", "krishna");

Output

Hello Mr.krishna
Good Morning Mr.krishna

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