CODEWITHSUNDEEP
node.js
DR01D
DR01D

Reputation: 1365

In node.js why was EventEmitter included in events as a circular reference?

The following code shows the contents of the events object.

const events = require('events');
console.log(events);

The output is,

{ [Function: EventEmitter]
  EventEmitter: [Circular],
  usingDomains: false,
  defaultMaxListeners: [Getter/Setter],
  init: [Function],
  listenerCount: [Function] }

There must be a benefit to using a circular reference for EventEmitter and not the rest but I'm not sure what it is. Why did they construct the events object using this pattern?

Upvotes: 1

Views: 202

Answers (1)

Vic
Vic

Reputation: 723

There must be a benefit to using a circular reference for EventEmitter

It was probably done for backwards compatibility.

Documentation for the events module wayyyy back suggests it was the only way to import EventEmitter.

"To access the EventEmitter class, require('events').EventEmitter"

Upvotes: 2

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