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@sharedutils/event-bus

v0.0.2

Published

A lightweight TypeScript event bus library with support for local and remote event dispatching

Readme

@sharedutils/event-bus

輕量級 TypeScript 事件匯流排,支援本地和遠端事件分發。

特性

  • 🚀 輕量級,零依賴
  • 💪 完整 TypeScript 類型支援
  • 📡 支援本地/遠端事件分發
  • 📦 Channel API 介面

安裝

npm install @sharedutils/event-bus

使用

基礎用法

import { EventBus } from '@sharedutils/event-bus';

const bus = new EventBus();

// 訂閱
const unsubscribe = bus.subscribe('user:login', async (event) => {
  console.log('User logged in:', event);
});

// 分發
bus.dispatch('user:login', { userId: '123', username: 'alice' });

// 取消訂閱
unsubscribe();

Channel API

interface UserLoginEvent {
  userId: string;
  username: string;
}

const loginChannel = bus.channel<UserLoginEvent>('user:login');

loginChannel.subscribe(async (event) => {
  console.log('User logged in:', event.username);
});

loginChannel.dispatch({ userId: '123', username: 'alice' });

遠端事件匯流排

import { RemoteEventBus } from '@sharedutils/event-bus';

const remoteBus = new RemoteEventBus((topic, event) => {
  websocket.send(JSON.stringify({ topic, event }));
});

// 訂閱(接收遠端事件)
remoteBus.subscribe('chat:message', async (msg) => console.log(msg));

// 發布到遠端
remoteBus.publish('chat:message', { text: 'Hello!' });

// 僅本地分發
remoteBus.dispatch('chat:message', { text: 'Local only' });

API

EventBus

| 方法 | 說明 | |------|------| | subscribe(topic, handler) | 訂閱主題,返回取消函數 | | dispatch(topic, event) | 本地分發事件 | | channel<T>(topic) | 建立類型安全的 Channel | | onSubscriberChange(handler) | 監聽訂閱變化 | | topics() | 取得所有主題 |

RemoteEventBus

繼承 EventBus,額外提供:

| 方法 | 說明 | |------|------| | publish(topic, event) | 發布到遠端 | | setPublishProvider(fn) | 設定發布函數 | | publisherChannel<T>(topic) | 建立發布 Channel |

License

ISC