偶数

简单快活事件发送库. 订阅基于一个独特的Token,可用于不订阅这个话题.

Eventer 用于闪电图^® 联合来文图书馆. https://www.arction.com/ (中文(简体) )

安装

npm install --save @arction/eventer

文档

在线文件可上网查阅 arction.github.io/eventer (英语)

开始

import { Eventer } from '@arction/eventer'

const eventer = new Eventer()

// new topic is created, handler is added as the first subscriber to the topic
const token1 = eventer.on('topic1', () => console.log('I am called from topic1'))
// 'topic1' already exists, so new listener is simply added to existing collection of handlers
const token2 = eventer.on('topic1', () => console.log('I am also called from topic1'))
// new collection of handlers is created for the second topic
// the function is added to it
eventer.on('topic2', () => console.log('I am called from topic2'))

eventer.emit('topic1')
// calls two functions which listen to the event
//
// outputs:
//    I am called from topic1
//    I am also called from topic1

eventer.emit('topic2')
// calls single functions which listen to the event
//
// outputs:
//    I am called from topic2

// remove the second listener from the first topic by token 
eventer.off(token2)

eventer.emit('topic1')
// calls single functions which listen to the event
//
// outputs:
//    I am called from topic1

// remove all listeners from all topics
eventer.allOff()

eventer.emit('topic2')
// nothing happened, since all subscriptions were terminated

订阅主题

订阅一个主题很容易.

eventer.on('topic', ()=>{ console.log('Topic handler') })

单个话题的多订阅可以存在.

eventer.on('topic', ()=>{ console.log('Topic handler') })
eventer.on('topic2', ()=>{ console.log('Topic 2 handler') })
eventer.on('topic3', ()=>{ console.log('Topic 3 handler') })

从主题取消订阅

您可以使用 脚本 当您订阅话题时, 由事件器返回 .

const token = eventer.on('topic', ()=>{ console.log('Topic handler') })

eventer.off(token)

您也可以从话题中解密所有听众 .

eventer.topicOff('topic')

还有可能取消所有话题和所有听众的订阅.

eventer.allOff()

发生事件

事件可以针对一个话题发布. 发音可以包含0个或更多个会提供给话题听众的参数.

eventer.emit('topic')

eventer.on('topic2', ( arg1, arg2 ) => console.log( arg1, arg2 ))

eventer.emit('topic2', 'Hello ', 'World')

发展指示

该项目使用TypeScript开发. 项目的构建系统严重依赖于Node.js. 依赖性由 无因此,记住运行 npm 安装 在开始其他事情之前.

有几个 npm 脚本,用于发展进程: