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typeevent

v1.0.5

Published

A typed event system, based on the TypeScript language and the es6 addition of Proxy

Downloads

1

Readme

TypeEvent

一个类型化的事件系统

基于 TypeScript 语言和 es6 增加的 Proxy

  • 直接使用事件对象的键值对,而不是字符串去索引事件。

  • 编写 emit 和 on 方法参数时根据事件不同获取准确的参数类型校验和自动补全。

  • 可以全局查找特定事件的引用,代码逻辑一目了然

开始使用

安装

npm:

npm install typeevent

yarn:

yarn add typeevent

创建事件处理器

// event.js
import { EventControl } from 'typeevent'

// 在这里枚举需要会出现的事件,以及它们传递哪些参数
interface Events extends EventControl {
    // 发送完成
    sent: [txHash: string]
    // 上传中
    uploading: [progress: number]
    // 点击事件
    clickon: [mousePosition: { x: number, y: number }]
}
// 创建事件处理器,记得传入刚刚创建的 Events 类型
export default EventControl<Events>()

收发事件

import Events from './events'

Events.sent.on(txHash => {
    // 无需再次声明为 string 类型
    console.log(txHash.toLocaleUpperCase())
})

Events.uploading.on(progress => {
  console.log(`Progress: ${progress}%`)
})

Events.uploading.emit(50)
// 打印: "Progress: 50%"
Events.uploading.emit(100)
// 打印: "Progress: 100%"
Events.sent.emit('0xe60cc11b8de')
// 打印: "0XE60CC11B8DE"

事件方法列表

on

监听事件,事件发送时触发会调函数

类型定义:

on(callback: (...args: EventArgs) => any): void

once

只执行一次的事件监听,执行过一次后就会被移除

类型定义:

once(callback: (...args: EventArgs) => any): void

emit

发送事件,传入事件所需的参数

emit(...args: EventArgs): void

offAll

移除该事件所有的监听

类型定义:

offAll(): void

off

移除该事件指定的监听,传入调用事件时相同的方法

类型定义:

off(callback: (...args: T) => any): void