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znu-event

v0.0.10

Published

A simple event emitter

Downloads

126

Readme

znu-event

🚀 a sample event emitter 🌈. 无依赖,TypeScript、rollup、自动测试

GitHub NPM 如果帮助到了你,请给我一个star~~~ 💖,如果你发现bug,请尽情的提issue。

安装

    npm i znu-event 

使用

import EventEmitter from  './znu-event';
const emitter = new EventEmitter();
emitter.on('add', data=>{
    console.log(data) // 1
});
emitter.emit('add', 1);

方法

on(eventName, listener)

绑定事件

|名称|类型|数据类型|是否必填|说明| |---|---|---|---|---| |eventName| 参数 |String/Symbol|是|事件名称| |listener| 参数 |Function|是|对应的回调函数| |emitter| 返回值 |EventEmitter|---|实例|

off(eventName, listener)

解除绑定, 如果不填写listener, 那么eventName对应的listener都会被移除.

|名称|类型|数据类型|是否必填|说明| |---|---|---|---|---| |eventName| 参数 |String/Symbol|是|事件名称| |listener| 参数 |Function|是|对应的回调函数| |emitter| 返回值 |EventEmitter|---|实例|

const callback = data=>{
    alert(data)
};
emitter.on('add', callback);
// 解除绑定
emitter.off('add', callback);
// add事件不会触发
emitter.emit('add', 1);

once(eventName, listener)

绑定事件, 只触发一次

|名称|类型|数据类型|是否必填|说明| |---|---|---|---|---| |eventName| 参数 |String/Symbol|是|事件名称| |listener| 参数 |Function|是|对应的回调函数| |emitter| 返回值 |EventEmitter|---|实例|

const callback = data=>{
    alert(data)
};
emitter.once('add', callback);
// add事件触发
emitter.emit('add', 1);
// add事件不会触发
emitter.emit('add', 1);

emit(eventName [, ...args])

触发事件, 支持任意数量参数

|名称|类型|数据类型|是否必填|说明| |---|---|---|---|---| |eventName| 参数 |String/Symbol|是|事件名称| | ...args| 参数 |Any|是|对应的回调函数| |emitter| 返回值 |Boolean|---|实例|

const callback = (a,b,c,d)=>{
    console(a,b,c,d); // 1,2,3,4
};
emitter.once('add', callback);
// add事件触发
emitter.emit('add', 1,2,3,4);

has(eventName)

是否绑定了指定事件

|名称|类型|数据类型|是否必填|说明| |---|---|---|---|---| |eventName| 参数 |String/Symbol|是|事件名称|

emitter.on('add', callback);

emitter.has('add'); // true

eventNames()

返回所有绑定事件名称

emitter.eventNames();

offAll()

解除所有绑定事件

const callback = (a,b,c,d)=>{
    console(a,b,c,d); // 1,2,3,4
};
emitter.on('add', callback);
emitter.on('edf', callback);
emitter.offAll();

// add,edf事件不会触发
emitter.emit('add', 1,2,3,4);
emitter.emit('edf', 1,2,3,4);

destroy()

销毁实例

const callback = (a,b,c,d)=>{
    console(a,b,c,d); // 1,2,3,4
};
emitter.once('add', callback);
emitter.destroy();

// add事件不会触发
emitter.emit('add', 1,2,3,4);