npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2025 – Pkg Stats / Ryan Hefner

@eventnexus/core

v0.1.4

Published

EventNexus - Event management and state synchronization library

Readme

EventNexus

🚀 EventNexus es una librería de gestión de eventos sencilla y eficiente para TypeScript/JavaScript que facilita la comunicación entre componentes de manera desacoplada y escalable.

✨ Características

  • 🎯 Patrón Singleton - Una sola instancia global
  • Eventos Síncronos y Asíncronos - Soporte completo para ambos modos
  • 🌟 Eventos Wildcard - Escucha todos los eventos con *
  • 🛡️ Manejo de Errores - Callbacks personalizables para errores
  • ⏱️ Timeouts y Abort Signals - Control de tiempo y cancelación
  • 🔧 Modos de Ejecución - Secuencial y paralelo
  • 📦 TypeScript - Tipado completo y seguro

📦 Instalación

npm install @eventnexus/core
# o
yarn add @eventnexus/core

🚀 Uso Básico

Eventos Síncronos

import { NexusEventManager } from '@eventnexus/core';

const eventManager = NexusEventManager.getInstance();

// Registrar un listener
eventManager.register('user:login', {
  handler: event => {
    console.log(`Usuario logueado: ${event.payload.name}`);
  },
});

// Emitir un evento
eventManager.emit({
  name: 'user:login',
  payload: { name: 'Juan Pérez', email: '[email protected]' },
});

Eventos Asíncronos

// Modo secuencial
await eventManager.emitAsync(
  {
    name: 'order:paid',
    payload: { orderId: 'ORD-001', amount: 99.99 },
  },
  {
    mode: 'sequential',
    stopOnError: true,
  }
);

// Modo paralelo
await eventManager.emitAsync(
  {
    name: 'notification:sent',
    payload: { message: 'Orden procesada', recipient: '[email protected]' },
  },
  {
    mode: 'parallel',
    timeOutMs: 5000,
  }
);

Eventos Wildcard

// Escuchar todos los eventos
eventManager.register('*', {
  handler: event => {
    console.log(`Evento detectado: ${event.name}`);
  },
});

⚙️ Configuración

Modo Debug

NexusEventManager.debug = true; // Habilita logs detallados

Manejo de Errores

NexusEventManager.onError = (error, info) => {
  console.error(`Error en evento "${info.event}":`, error);
};

Límite de Listeners

NexusEventManager.maxListeners = 10; // Límite de listeners por evento

🎯 Casos de Uso

E-commerce

// Flujo completo de compra
eventManager.emit({ name: 'user:login', payload: userData });
eventManager.emit({ name: 'order:created', payload: orderData });

await eventManager.emitAsync(
  {
    name: 'order:paid',
    payload: paymentData,
  },
  { mode: 'sequential' }
);

await eventManager.emitAsync(
  {
    name: 'notification:sent',
    payload: notificationData,
  },
  { mode: 'parallel' }
);

Sistema de Notificaciones

// Listener wildcard para logging
eventManager.register('*', {
  handler: event => {
    console.log(`[${new Date().toISOString()}] ${event.name}`, event.payload);
  },
});

📚 API Reference

NexusEventManager

Métodos

  • getInstance() - Obtiene la instancia singleton
  • register<T>(eventName: string, listener: NexusEventListener<T>) - Registra un listener
  • emit<T>(event: NexusEvent<T>) - Emite un evento síncronamente
  • emitAsync<T>(event: NexusEvent<T>, options: EmitAsyncOptions) - Emite un evento asíncronamente

Propiedades Estáticas

  • debug: boolean - Habilita modo debug
  • maxListeners: number - Límite de listeners por evento
  • onError?: (error: unknown, info: { event: string; listenerIndex: number }) => void - Callback de error

NexusEventsBuilder

Métodos

  • getInstance() - Obtiene la instancia singleton
  • add(eventName: string) - Crea un nuevo evento y retorna su símbolo
  • get() - Retorna todos los eventos registrados

Tipos

interface NexusEvent<T> {
  name: string;
  payload: T;
}

interface NexusEventListener<T> {
  handler: (event: NexusEvent<T>) => void | Promise<void>;
}

interface EmitAsyncOptions {
  mode?: 'sequential' | 'parallel';
  stopOnError?: boolean;
  timeOutMs?: number;
  signal?: AbortSignal;
}

MIT

🤝 Contribuir

Las contribuciones son bienvenidas. Por favor, abre un issue o pull request.