eventemitter3 vs mitt vs tiny-emitter vs @nestjs/event-emitter
Event Emitter Libraries Comparison
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eventemitter3mitttiny-emitter@nestjs/event-emitterSimilar Packages:
What's Event Emitter Libraries?

Event emitter libraries provide a way to manage and handle events in JavaScript applications. They allow developers to create custom events and listen for them, facilitating communication between different parts of an application. These libraries are particularly useful in scenarios where decoupling components is necessary, enabling a more modular and maintainable codebase. Each library has its own unique features and design principles, catering to different use cases and preferences in event handling.

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eventemitter351,023,7773,42873.4 kB172 years agoMIT
mitt10,562,01511,34226.4 kB202 years agoMIT
tiny-emitter4,466,924957-96 years agoMIT
@nestjs/event-emitter705,54822635.7 kB23 months agoMIT
Feature Comparison: eventemitter3 vs mitt vs tiny-emitter vs @nestjs/event-emitter

Performance

  • eventemitter3:

    eventemitter3 is known for its exceptional performance, being one of the fastest event emitters available. It minimizes overhead and is optimized for both Node.js and browser environments, making it ideal for performance-sensitive applications.

  • mitt:

    mitt is designed to be extremely lightweight, with a minimalistic approach that ensures fast event handling. Its simplicity contributes to its performance, making it a great choice for small applications or microservices.

  • tiny-emitter:

    tiny-emitter is very small in size and provides efficient event handling with minimal overhead. Its lightweight nature ensures that it performs well even in resource-constrained environments.

  • @nestjs/event-emitter:

    @nestjs/event-emitter is built with performance in mind, leveraging the NestJS framework's optimizations. It supports asynchronous event handling, making it suitable for high-performance applications where event processing speed is crucial.

API Design

  • eventemitter3:

    eventemitter3 provides a straightforward API that is easy to use. It supports basic event management functions like on, off, and emit, making it accessible for developers who need a simple solution without unnecessary complexity.

  • mitt:

    mitt has a minimalistic API with just three methods: on, off, and emit. This simplicity makes it very easy to learn and use, perfect for developers who want to implement event handling quickly without a steep learning curve.

  • tiny-emitter:

    tiny-emitter features a simple and intuitive API that allows for easy event registration and triggering. Its design is focused on being user-friendly, making it accessible for developers of all skill levels.

  • @nestjs/event-emitter:

    @nestjs/event-emitter offers a rich API that integrates deeply with NestJS concepts such as modules and providers. It allows for structured event handling and supports decorators for event listeners, making it easy to manage events in a NestJS application.

Integration

  • eventemitter3:

    eventemitter3 can be easily integrated into both Node.js and browser applications, making it versatile for various environments. It can be used alongside other libraries and frameworks without compatibility issues.

  • mitt:

    mitt is highly portable and can be integrated into any JavaScript project with ease. Its lightweight nature allows for quick adoption in both small and large applications, making it a flexible choice for developers.

  • tiny-emitter:

    tiny-emitter is designed for easy integration into any JavaScript project. Its small size and straightforward API make it a good fit for projects that require basic event handling without the need for extensive setup.

  • @nestjs/event-emitter:

    @nestjs/event-emitter is specifically designed for integration with the NestJS framework, allowing for seamless event-driven architecture within NestJS applications. It works well with other NestJS features like middleware and guards, enhancing overall application architecture.

Use Cases

  • eventemitter3:

    eventemitter3 is suitable for a wide range of applications, from simple event handling in small projects to more complex event-driven architectures in larger applications, making it a versatile choice.

  • mitt:

    mitt is perfect for small to medium-sized projects where a lightweight event emitter is needed. It's especially useful in scenarios where quick event handling is required without the overhead of larger libraries.

  • tiny-emitter:

    tiny-emitter is best for projects that prioritize minimalism and size, making it suitable for small applications, browser extensions, or any scenario where a simple event emitter is sufficient.

  • @nestjs/event-emitter:

    @nestjs/event-emitter is ideal for applications built with NestJS that require a robust event-driven architecture, such as microservices or complex applications where different modules need to communicate through events.

Community and Support

  • eventemitter3:

    eventemitter3 has a solid user base and community support, with good documentation available. However, it may not have as extensive resources as larger frameworks.

  • mitt:

    mitt is popular among developers for its simplicity and ease of use, and while it has a smaller community, it is well-documented and easy to find examples and support.

  • tiny-emitter:

    tiny-emitter has a small but dedicated community. Its simplicity means that most developers can quickly understand and implement it, although community resources may be limited compared to larger libraries.

  • @nestjs/event-emitter:

    @nestjs/event-emitter benefits from the strong community and support of the NestJS ecosystem, providing extensive documentation and resources for developers working within that framework.

How to Choose: eventemitter3 vs mitt vs tiny-emitter vs @nestjs/event-emitter
  • eventemitter3:

    Select eventemitter3 for a lightweight and high-performance solution that is suitable for both Node.js and browser environments. It's ideal for projects that prioritize speed and minimal overhead.

  • mitt:

    Opt for mitt if you need a tiny, simple, and straightforward event emitter with a minimal API. It's perfect for small projects or when you want to quickly implement event handling without additional complexity.

  • tiny-emitter:

    Consider tiny-emitter if you want a very small footprint and a straightforward implementation. It's great for projects where size is a concern and you need basic event handling capabilities.

  • @nestjs/event-emitter:

    Choose @nestjs/event-emitter if you are working within the NestJS framework and require a robust event-driven architecture that integrates seamlessly with other NestJS features, such as dependency injection and modules.

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.

Similar Npm Packages to @nestjs/event-emitter

@nestjs/event-emitter is an event-driven library designed specifically for use with NestJS applications. It provides a simple and efficient way to implement an event-driven architecture, allowing developers to create and manage custom events within their applications. This package is particularly useful for decoupling components and enabling asynchronous communication between different parts of an application. With its integration into the NestJS framework, it leverages decorators and dependency injection, making it easy to use within the context of NestJS services and modules.

While @nestjs/event-emitter offers a robust solution for event handling in NestJS, there are several alternatives available in the broader JavaScript ecosystem:

  • eventemitter3 is a high-performance event emitter library that is lightweight and simple to use. It is designed to be faster than the native Node.js EventEmitter and provides a straightforward API for managing events. If you need a fast and efficient event emitter for a general JavaScript application, eventemitter3 is an excellent choice. Its minimalistic design and performance optimizations make it suitable for both browser and Node.js environments.

  • mitt is another tiny event emitter library that focuses on simplicity and minimalism. With a very small footprint, mitt provides a clean API for registering and emitting events. It is particularly well-suited for projects where you want to keep dependencies to a minimum while still having a functional event system. If you are looking for a lightweight solution for event handling without any additional features, mitt is a great option.

  • tiny-emitter is a small and flexible event emitter library that offers a simple API for managing events. It is designed to be easy to use and integrate into any JavaScript application. tiny-emitter is particularly useful for projects that require a straightforward event handling mechanism without the overhead of more complex libraries. Its simplicity makes it a good fit for both small and medium-sized applications.

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

README for eventemitter3

EventEmitter3

Version npmCICoverage Status

Sauce Test Status

EventEmitter3 is a high performance EventEmitter. It has been micro-optimized for various of code paths making this, one of, if not the fastest EventEmitter available for Node.js and browsers. The module is API compatible with the EventEmitter that ships by default with Node.js but there are some slight differences:

  • Domain support has been removed.
  • We do not throw an error when you emit an error event and nobody is listening.
  • The newListener and removeListener events have been removed as they are useful only in some uncommon use-cases.
  • The setMaxListeners, getMaxListeners, prependListener and prependOnceListener methods are not available.
  • Support for custom context for events so there is no need to use fn.bind.
  • The removeListener method removes all matching listeners, not only the first.

It's a drop in replacement for existing EventEmitters, but just faster. Free performance, who wouldn't want that? The EventEmitter is written in EcmaScript 3 so it will work in the oldest browsers and node versions that you need to support.

Installation

$ npm install --save eventemitter3

CDN

Recommended CDN:

https://unpkg.com/eventemitter3@latest/dist/eventemitter3.umd.min.js

Usage

After installation the only thing you need to do is require the module:

var EventEmitter = require('eventemitter3');

And you're ready to create your own EventEmitter instances. For the API documentation, please follow the official Node.js documentation:

http://nodejs.org/api/events.html

Contextual emits

We've upgraded the API of the EventEmitter.on, EventEmitter.once and EventEmitter.removeListener to accept an extra argument which is the context or this value that should be set for the emitted events. This means you no longer have the overhead of an event that required fn.bind in order to get a custom this value.

var EE = new EventEmitter()
  , context = { foo: 'bar' };

function emitted() {
  console.log(this === context); // true
}

EE.once('event-name', emitted, context);
EE.on('another-event', emitted, context);
EE.removeListener('another-event', emitted, context);

Tests and benchmarks

This module is well tested. You can run:

  • npm test to run the tests under Node.js.
  • npm run test-browser to run the tests in real browsers via Sauce Labs.

We also have a set of benchmarks to compare EventEmitter3 with some available alternatives. To run the benchmarks run npm run benchmark.

Tests and benchmarks are not included in the npm package. If you want to play with them you have to clone the GitHub repository. Note that you will have to run an additional npm i in the benchmarks folder before npm run benchmark.

License

MIT

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