Shijian

「事件」 A tiny event library that supports auto binding and bulk unsubscribe by consumer.

Classic usage

import Shijian from 'shijian'

var events = new Shijian()

function say(name) {
    alert(`Hello, ${name}!`)
}

events.on('name', say)
events.emit('name', 'Jessie')
events.off('name', say)

Auto binding

import React from 'react'
import Shijian from 'shijian'

var events = new Shijian()

class MyComponent extends React.Component {
    
    componentDidMount() {
        events.on('update', this, 'onUpdate')
              .on('error', this, 'onError')
    }

    componentWillUnmount() {
        events.off(this) // remove all listeners from this component instance
    }

    // `this` value is bound to the component instance
    onUpdate() {}
    onError() {}
}

Mixin

import Shijian from 'shijian'

class Cat {}
Object.assign(Cat.prototype, Shijian.prototype)
var cat = new Cat()
myObj.emit('meow')

Supported browsers

All modern browsers and Internet Explorer 6+.

API

Shijian#on(event, listener)

Shijian#once(event, listener)

Adds a listener to the end of the listeners array for the specified event.

• event: string - The name of the event you want to add.
• listener: function - Listener you want to add from given event.

Shijian#on(event, thisArg, funcName, *args)

Shijian#once(event, thisArg, funcName, *args)

Adds an auto-bind listener to the end of the listeners array for the specified event.

• event: string - The name of the event you want to add.
• thisArg: object - The consumer object.
• funcName: string - The listener function name of consumer object.
• args - Arguments to prepend to listener function.

Shijian#off(event, listener)

Remove a listener from the listener array for the specified event.

• event: string - The name of the event.
• listener: function - Listener you want to remove from the given event.

Shijian#off([event], thisArg, [funcName])

Bulk remove auto-bind listeners.

• event: string - The name of the event.
• thisArg: object - The consumer object.
• funcName: string - The callback function name.

Shijian#emit(event, *args)

Execute each of the listeners in order with the supplied arguments.

• event: string - The name of the event you want to emit.
• args - Arguments to the listener function.

URL

https://www.github.com/weijarz/shijian

License

Licensed under the MIT license.