Difference Between EventEmitter and NodeEventTarget Last Updated : 01 Sep, 2020 Comments Improve Suggest changes Like Article Like Report EventEmitter: All EventEmitters emit the event 'newListener' when new listeners are added and 'removeListener' when existing listeners are removed. It is defined and exposed by the events module: To import EventEmitter, use the following import statement: const EventEmitter = require('events'); NodeEventTarget: The EventTarget and Event objects are a Node.js-specific implementation of the EventTarget Web API that is exposed by some Node.js core APIs. Difference between EventEmitter and NodeEventTarget: Event EmitterNode Event TargetIt is inherited from the events Module of JavaScript.It is a modified subset of EventEmitter API and inherited from it.It implements is-a relationship with the events Module.It implements is-a relationship with the EventTarget API.In eventEmitter, for the same event, we can allow multiple listeners to be registered.Any listener can be registered once per event type and it gets ignored if attempted to register a listener multiple times.It emulates the most from Events such as 'error', 'Classes', Emits, etc. It does not emulate the full EventEmitter APIs like prependListener(), prependOnceListener(), rawListeners(), etc.Its default behavior is to log information and end the current execution.For 'error' type events, it does not implement any default behavior. If an error occurs within an EventEmitter instance, then the typical action is for an 'error' event to be emitted. It supports EventListener objects and functions as handlers for all event types. All EventEmitter emit the event ‘newListener’, when new listeners are added and ‘removeListener’ when listeners are removed.It isn't an instance of EventEmitter and in most cases, it can't be used in place of an EventEmitter. Syntax: emitter.once( eventName, listener) Syntax: nodeEventTarget.once( type, listener[, options]) Reference: https://nodejs.org/api/events.html#events_nodeeventtarget_vs_eventemitter Comment More infoAdvertise with us Next Article Difference Between EventEmitter and NodeEventTarget A amitkumarjee Follow Improve Article Tags : Difference Between Web Technologies Node.js Node.js-Misc Web Technologies - Difference Between +1 More Similar Reads Difference Btween $(this) and event.target $(this) and event.target Both are used to refer to the elements in the context of the event handling but serve different purposes and have different usages. This article will explore the differences between $(this) and event.target providing the descriptions, syntax and example code for each.These a 3 min read Difference between DOMContentLoaded and load Events These two events In web development, the DOMContentLoaded and load events are used to detect when parts of the webpage are ready. The DOMContentLoaded event fires when the HTML is fully parsed and the DOM is ready, while the load event waits until all resources like images, scripts, and stylesheets 3 min read Difference between server sent events and Websockets in HTML5 WebSockets WebSockets is a complicated technology that permits real-time interactive bidirectional communication between the client browser and a server. This is accomplished by establishing a standard method for the server to transmit information to the client without first receiving an invitation 4 min read Difference between Stimulus and Response Events 1. Stimulus Events : In a real-time system, environment generates such type of events and these events act on the environment. Stimulus events are aperiodic and asynchronous. Example: Typing on keyboard generates a stimulus event to act on the computer system. Measuring of temperature in nuclear pla 1 min read Difference between Node.js and JavaScript JavaScript and Node.js are both crucial in modern web development, but they serve different purposes and are used in different environments. JavaScript is a programming language primarily used for client-side web development, while Node is a runtime environment that allows JavaScript to be executed 3 min read Like