CODEWITHSUNDEEP
node.js
Dev Choudhary
Dev Choudhary

Reputation: 105

Nodejs: creating EventEmitter object

I am new to nodejs. I came across these two ways as follow for instantiating EventEmitter class as follows - 

const events = require('events');

const e = new events.EventEmitter();
const e1 = new events();

console.log(e)
console.log(e1)

How come both e and e1 are instantiated from EventEmitter? Which is the right way? Am I m missing anything here?

Upvotes: 0

Views: 292

Answers (2)

garfield chou
garfield chou

Reputation: 21

According to Events module line#68 and Events module line#73

screenshot

node -p "events.EventEmitter === events"

This will get the result of true, which means "events.EventEmitter" and "events" in your code can be used to instantiate EventEmitter.

Upvotes: 2

Manjeet Singh
Manjeet Singh

Reputation: 2398

First, in your code, you need to define EventEmitter

so that you can create instance new EventEmitter();

const events = require('events');

const EventEmitter = require('events'); // correct in your code 

const e = new events.EventEmitter();

const e1 = new EventEmitter();

console.log(e)
console.log(e1)

Which is the right way

they are both the correct way and it is up to you in which way you want to write

I personally prefer e1 because it looks clean

example

as you update your question

const events = require('events');

const e = new events.EventEmitter();
const e1 = new events();

console.log(e)
console.log(e1)

e1 is a clean way but Constructor function name should be Captial, convention in Javascript is to only capitalize constructors

 const Events = require('events');
 const e1 = new Events();

Upvotes: 0

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