@vielzeug/herald

Typed synchronous event bus with wildcard subscriptions, one-shot waits, and lifecycle tracing

Installation

pnpm add @vielzeug/herald
npm install @vielzeug/herald
yarn add @vielzeug/herald

Quick Start

import { createBus } from '@vielzeug/herald';

interface AppEvents {
  'user:login': { userId: string };
  'user:logout': void;
}

using bus = createBus<AppEvents>({ name: 'app' });
const stop = bus.on('user:login', ({ userId }) => console.log(userId));

bus.emit('user:login', { userId: '42' });
bus.emit('user:logout');
stop();

Documentation

• Overview
• Usage Guide
• API Reference
• Examples
• Migration Guide

License

MIT © Helmuth Saatkamp: part of the Vielzeug monorepo.