event-emitter vs eventemitter2 vs eventemitter3 vs mitt vs tiny-emitter
Event Emitter Libraries
Search packages..
event-emittereventemitter2eventemitter3mitttiny-emitterSimilar Packages:

Event Emitter Libraries

Event emitter libraries in JavaScript provide a way to implement the observer pattern, allowing objects to communicate with each other by emitting events and listening for them. These libraries facilitate asynchronous programming by enabling decoupled components to react to specific actions or changes in state, promoting a more modular and maintainable code structure. They are commonly used in Node.js and browser applications for handling events, managing state changes, and implementing custom event-driven architectures.

Npm Package Weekly Downloads Trend

3 Years

Github Stars Ranking

Stat Detail

Package
Downloads
Stars
Size
Issues
Publish
License
event-emitter0244-69 years agoMIT
eventemitter202,93381.3 kB50-MIT
eventemitter303,53274.4 kB215 months agoMIT
mitt011,87226.4 kB263 years agoMIT
tiny-emitter0972-97 years agoMIT

Feature Comparison: event-emitter vs eventemitter2 vs eventemitter3 vs mitt vs tiny-emitter

Size and Performance

  • event-emitter:

    event-emitter is a lightweight library with minimal overhead, making it suitable for applications where performance is important but advanced features are not required.

  • eventemitter2:

    eventemitter2 is slightly larger than basic emitters but offers better performance for complex event handling, especially with its support for wildcard events and namespaces.

  • eventemitter3:

    eventemitter3 is designed for high performance with a very small footprint, making it one of the fastest event emitters available, ideal for performance-critical applications.

  • mitt:

    mitt is extremely small (just 200 bytes) and fast, making it one of the most lightweight event emitters available. Its simplicity ensures minimal performance impact, making it ideal for high-frequency event handling.

  • tiny-emitter:

    tiny-emitter is a small library (about 1KB) that provides efficient event handling with low overhead. It is designed to be fast and lightweight, suitable for applications where performance is a concern.

Feature Set

  • event-emitter:

    event-emitter provides basic event emitting and listening capabilities, allowing for simple one-to-one and one-to-many event handling. It does not include advanced features like namespaces or wildcard events, keeping the API simple and straightforward.

  • eventemitter2:

    eventemitter2 offers a rich feature set, including support for wildcard events, namespaces, and the ability to set maximum listeners to prevent memory leaks. This makes it more versatile for complex applications that require advanced event handling.

  • eventemitter3:

    eventemitter3 focuses on providing a fast and efficient event handling system with a simple API. It supports multiple listeners, listener removal, and event emission, but does not include advanced features like namespaces or wildcards, keeping it lightweight and easy to use.

  • mitt:

    mitt provides a very simple API for emitting and listening to events. It supports multiple listeners per event and allows for easy removal of listeners. However, it does not include advanced features like namespaces, wildcards, or error handling, which keeps it minimal but limits its functionality for more complex use cases.

  • tiny-emitter:

    tiny-emitter supports multiple listeners, listener removal, and provides a straightforward API for event handling. It is simple and easy to use, but does not include advanced features like namespaces or wildcard events, making it suitable for projects that need basic event handling without complexity.

Ease of Use: Code Examples

  • event-emitter:

    Basic usage of event-emitter

    const EventEmitter = require('event-emitter');
const emitter = EventEmitter();

// Simple event handling
emitter.on('event', () => console.log('Event triggered!'));
emitter.emit('event');
  • eventemitter2:

    Basic usage of eventemitter2

    const EventEmitter2 = require('eventemitter2').EventEmitter2;
const emitter = new EventEmitter2();

// Wildcard event handling
emitter.on('user.*', (data) => console.log('User event:', data));
emitter.emit('user.login', { username: 'Alice' });
  • eventemitter3:

    Basic usage of eventemitter3

    const EventEmitter = require('eventemitter3');
const emitter = new EventEmitter();

// Simple event handling
emitter.on('event', () => console.log('Event triggered!'));
emitter.emit('event');
  • mitt:

    Basic usage of mitt

    const mitt = require('mitt');
const emitter = mitt();

// Simple event handling
emitter.on('event', () => console.log('Event triggered!'));
emitter.emit('event');
  • tiny-emitter:

    Basic usage of tiny-emitter

    const Emitter = require('tiny-emitter');
const emitter = new Emitter();

// Simple event handling
emitter.on('event', () => console.log('Event triggered!'));
emitter.emit('event');

How to Choose: event-emitter vs eventemitter2 vs eventemitter3 vs mitt vs tiny-emitter

  • event-emitter:

    Choose event-emitter if you need a simple and lightweight implementation of the event emitter pattern with a focus on minimalism and ease of use. It is suitable for small to medium-sized projects where basic event handling is required.

  • eventemitter2:

    Choose eventemitter2 if you need a feature-rich event emitter with support for wildcard events, namespaces, and better performance for high-frequency events. It is ideal for larger applications that require more advanced event handling capabilities while still being relatively lightweight.

  • eventemitter3:

    Choose eventemitter3 if you prioritize performance and a small footprint. It is designed to be one of the fastest event emitters available, making it a great choice for performance-critical applications where every millisecond counts, without sacrificing functionality.

  • mitt:

    Choose mitt if you want an ultra-lightweight (just 200 bytes) and simple event emitter with a minimal API. It is perfect for projects where simplicity and low overhead are key, and you don’t need advanced features like namespaces or wildcard events.

  • tiny-emitter:

    Choose tiny-emitter if you need a tiny (about 1KB) and straightforward event emitter with support for multiple listeners and the ability to remove them easily. It strikes a good balance between size and functionality, making it suitable for projects that need a reliable emitter without a lot of bloat.

Similar Npm Packages to event-emitter

event-emitter is a simple and lightweight event management library for JavaScript applications. It allows developers to create and manage custom events, enabling a decoupled architecture where different parts of an application can communicate without being tightly bound to one another. While event-emitter provides a straightforward solution for event handling, there are several alternatives in the ecosystem that offer additional features or optimizations. Here are a few noteworthy alternatives:

  • eventemitter2 is an enhanced version of the original event emitter, providing additional features such as wildcard event names, event namespaces, and improved performance. It is designed to be a drop-in replacement for the standard event emitter, making it a great choice for applications that require more advanced event handling capabilities. If you need features like event prioritization or the ability to listen to events with wildcard patterns, eventemitter2 is a solid option.

  • eventemitter3 is another alternative that focuses on performance and simplicity. It is a lightweight event emitter that offers a minimal API while maintaining high performance. eventemitter3 is particularly well-suited for applications where performance is critical, as it is optimized for speed and memory usage. If you are looking for a fast and efficient event emitter without unnecessary overhead, eventemitter3 is a great choice.

  • mitt is a tiny and lightweight event emitter that is designed to be extremely simple and easy to use. It has a minimal API and is perfect for small projects or when you need a quick and straightforward solution for event handling. mitt is particularly useful in scenarios where you want to avoid the complexity of larger libraries while still having a reliable event management system.

  • tiny-emitter is another lightweight event emitter that focuses on simplicity and ease of use. It provides a clean and minimalistic API for managing events, making it easy to integrate into any project. If you want a straightforward solution for event handling without any additional features or complexity, tiny-emitter is a great option.

To see how event-emitter compares with eventemitter2, eventemitter3, mitt, and tiny-emitter, check out the comparison: Comparing event-emitter vs eventemitter2 vs eventemitter3 vs mitt vs tiny-emitter.

Similar Npm Packages to eventemitter3

eventemitter3 is a high-performance event emitter library for JavaScript applications. It provides a simple and efficient way to handle events, allowing developers to create and manage custom events in their applications. With a focus on performance and minimal overhead, eventemitter3 is ideal for applications that require a lightweight and fast event handling solution.

While eventemitter3 is a robust choice, there are several alternatives available that also provide event handling capabilities. Here are a few noteworthy options:

  • mitt is a tiny and fast event emitter library that is designed for simplicity. With a minimal API and no dependencies, mitt allows developers to easily create and manage events without the overhead of more complex libraries. It is particularly well-suited for small to medium-sized applications where a lightweight solution is preferred. If you need a straightforward event emitter that gets the job done without any frills, mitt is an excellent choice.
  • nanoevents is another lightweight event emitter library that focuses on performance and simplicity. With a very small footprint, nanoevents provides a straightforward API for creating and managing events. It is designed to be fast and efficient, making it a great option for applications that require high-performance event handling. If you are looking for an event emitter that is both minimal and effective, nanoevents is worth considering.

To see how eventemitter3 compares with mitt and nanoevents, check out the comparison: Comparing eventemitter3 vs mitt vs nanoevents.

Similar Npm Packages to mitt

mitt is a tiny and efficient event emitter library for JavaScript applications. It provides a simple API for creating and managing events, allowing developers to easily implement event-driven architectures in their applications. With mitt, you can create custom events, listen for them, and trigger them without the overhead of more complex event management systems. Its lightweight nature makes it an excellent choice for projects that require a straightforward solution for event handling.

While mitt is a popular choice, there are alternatives available that also provide event emitter functionality. Here are a couple of noteworthy options:

  • mitt is often mentioned alongside itself due to its simplicity and effectiveness. It allows for a clean and minimalistic approach to event handling, making it easy to integrate into any JavaScript application. The API is straightforward, with methods for on, off, and emit, which cover the essential functionalities needed for event management. This makes mitt a go-to option for developers looking for a no-frills event emitter.
  • nanoevents is another lightweight event emitter library that focuses on performance and simplicity. It offers a similar API to mitt, allowing developers to create event listeners and emit events with ease. One of the distinguishing features of nanoevents is its support for namespaces, which can help organize events better in larger applications. If you are looking for an alternative to mitt that still maintains a minimal footprint while providing additional features, nanoevents is worth considering.

For a comprehensive comparison of these packages, check out the following link: Comparing mitt vs mitt vs nanoevents.

Similar Npm Packages to tiny-emitter

tiny-emitter is a lightweight event emitter library for JavaScript. It provides a simple and efficient way to create and manage custom events in your applications. With a minimal footprint, tiny-emitter is perfect for projects where you need an event-driven architecture without the overhead of larger libraries. Its straightforward API allows developers to easily subscribe to events, emit them, and manage event listeners, making it a popular choice for both small and medium-sized projects.

While tiny-emitter is a solid choice for event handling, there are several alternatives in the JavaScript ecosystem that also offer event emitter functionality. Here are a few notable options:

  • eventemitter3 is a fast and lightweight event emitter implementation that is designed to be compatible with Node.js and the browser. It offers a similar API to Node.js's built-in EventEmitter but with improved performance and a smaller footprint. If you need a robust event emitter with excellent performance characteristics, eventemitter3 is a great option, especially for applications that require high-frequency event handling.

  • mitt is a tiny functional event emitter that is extremely lightweight and easy to use. It provides a simple API for subscribing to and emitting events, making it an excellent choice for projects where simplicity and minimalism are key. mitt is particularly useful for small applications or components where you want to avoid the complexity of larger event emitter libraries.

  • nanoevents is another minimalistic event emitter library that focuses on performance and simplicity. It provides a clean API for managing events and is designed to be as lightweight as possible. If you're looking for an event emitter that is both fast and easy to integrate into your projects, nanoevents is a solid choice.

To see how tiny-emitter compares with eventemitter3, mitt, and nanoevents, check out the comparison: Comparing eventemitter3 vs mitt vs nanoevents vs tiny-emitter.

README for event-emitter

event-emitter

Environment agnostic event emitter

Installation

$ npm install event-emitter

To port it to Browser or any other (non CJS) environment, use your favorite CJS bundler. No favorite yet? Try: Browserify, Webmake or Webpack

Usage

var ee = require('event-emitter');

var MyClass = function () { /* .. */ };
ee(MyClass.prototype); // All instances of MyClass will expose event-emitter interface

var emitter = new MyClass(), listener;

emitter.on('test', listener = function (args) {
  // … react to 'test' event
});

emitter.once('test', function (args) {
  // … react to first 'test' event (invoked only once!)
});

emitter.emit('test', arg1, arg2/*…args*/); // Two above listeners invoked
emitter.emit('test', arg1, arg2/*…args*/); // Only first listener invoked

emitter.off('test', listener);              // Removed first listener
emitter.emit('test', arg1, arg2/*…args*/); // No listeners invoked

Additional utilities

allOff(obj) (event-emitter/all-off)

Removes all listeners from given event emitter object

hasListeners(obj[, name]) (event-emitter/has-listeners)

Whether object has some listeners attached to the object. When name is provided, it checks listeners for specific event name

var emitter = ee();
var hasListeners = require('event-emitter/has-listeners');
var listener = function () {};

hasListeners(emitter); // false

emitter.on('foo', listener);
hasListeners(emitter); // true
hasListeners(emitter, 'foo'); // true
hasListeners(emitter, 'bar'); // false

emitter.off('foo', listener);
hasListeners(emitter, 'foo'); // false

pipe(source, target[, emitMethodName]) (event-emitter/pipe)

Pipes all events from source emitter onto target emitter (all events from source emitter will be emitted also on target emitter, but not other way).
Returns pipe object which exposes pipe.close function. Invoke it to close configured pipe.
It works internally by redefinition of emit method, if in your interface this method is referenced differently, provide its name (or symbol) with third argument.

unify(emitter1, emitter2) (event-emitter/unify)

Unifies event handling for two objects. Events emitted on emitter1 would be also emitted on emitter2, and other way back.
Non reversible.

var eeUnify = require('event-emitter/unify');

var emitter1 = ee(), listener1, listener3;
var emitter2 = ee(), listener2, listener4;

emitter1.on('test', listener1 = function () { });
emitter2.on('test', listener2 = function () { });

emitter1.emit('test'); // Invoked listener1
emitter2.emit('test'); // Invoked listener2

var unify = eeUnify(emitter1, emitter2);

emitter1.emit('test'); // Invoked listener1 and listener2
emitter2.emit('test'); // Invoked listener1 and listener2

emitter1.on('test', listener3 = function () { });
emitter2.on('test', listener4 = function () { });

emitter1.emit('test'); // Invoked listener1, listener2, listener3 and listener4
emitter2.emit('test'); // Invoked listener1, listener2, listener3 and listener4

Tests Build Status

$ npm test
npm-compare.com is an independent website designed to help developers choose the most suitable npm packages. We are not affiliated with npm, Inc, the official website for the npm registry. Note that npm is a registered trademark of npm, Inc. Please share your feedback via our GitHub repository. For more details, please refer to our Terms & Privacy.