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observable-emit

v1.1.1

Published

javascript emit events

Downloads

51

Readme

观察者模式

定义对象间的一种一对多的依赖关系,当一个对象的状态发生改变时,所有依赖于它的对象都将得到通知。包含订阅,分发,取消订阅。

Build Status codecov NPM downloads JS gzip size Npm package GitHub stars GitHub license

GetCode

git clone https://github.com/sakitam-fdd/observable-emit.git
npm install
npm run dev
npm run build
npm run karma.test
npm run karma.cover

Use

CDN

https://unpkg.com/[email protected]/dist/Observable.min.js
https://unpkg.com/[email protected]/dist/Observable.js

NPM

npm install observable-emit --save
import Observable from 'observable-emit'

Example

  var emiter = new Observable()
  emiter.on('event1', function(event, data) {
    console.log(event, data)
  })
  // 触发一次取消订阅
  emiter.once('event1', function(event, data) {
    console.log(event, data)
  })
  emiter.on('event2', function(event, data) {
    console.log(event, data)
  })
  
  emiter.dispatch('event1', 'one')
  emiter.dispatchSync('event2', 'two')
// one

// 取消订阅, 不传时默认取消所有
emiter.un('event1')

Methods

on(eventName, callback, context)

addEventListener(eventName, callback, context) -- alias

订阅事件

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | eventName | string or Object | 事件名称, 可以使用空格分开订阅多个事件,也可以使用对象例如dom对象 | | callback | function | 回调函数 | | context | function | 上下文 |

once(eventName, callback, context)

订阅事件(仅触发一次即取消订阅)

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | eventName | string or Object | 事件名称, 可以使用空格分开订阅多个事件,也可以使用对象例如dom对象 | | callback | function | 回调函数 | | context | function | 上下文 |

un(eventName, callback, context)

removeEventListener(eventName, callback, context) -- alias

取消订阅,无参数时默认取消所有事件订阅

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | eventName | string or Object | 事件名称, 可以使用空格分开订阅多个事件,也可以使用对象例如dom对象 | | callback | function | 订阅函数 | | context | function | 上下文 |

dispatch(eventName, ...)

触发事件,实时(参数不定)

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | eventName | string | 事件名称 |

dispatchSync(eventName, ...)

触发事件,异步(参数不定)

Parameters:

| key | type | desc | | :--- | :--- | :---------- | | eventName | string | 事件名称 |