XH-EVENT-BUS

description：Simulate the event bus implemented by vue2. You can use it just like using the event bus of vue! And there is no need to introduce vue dependency package!

Useing

1、install

• npm install xh-event-bus -D（recommend）
• yarn add xh-event-bus
• cnpm install xh-event-bus -D

1、require xh-event-bus

const { _EventBus } = require('xh-event-bus')

2、

// Add an event callback to the event bus named T
e.$on('T', function(...arg) {
    console.log(arg)
}) 

// Add an event callback to the event bus named T, but the event will be destroyed after it is triggered once
e.$once('T', function(...arg) {
    console.log(arg, 'once')
})

// Both callbacks are called
e.$emit('T', 123, 3)
// The callback added by once will not be called
e.$emit('T', 123, 3)

// off classification:
// 1、No parameters are passed in, destroy all event buses
// 2、The eventName is passed in, and all event callbacks of the current event are destroyed
// 3、The eventName and callback are passed in to destroy the current callback of the current event
e.$off('T')

//An error is reported because all events have been uninstalled
e.$emit('T')

Because this library is completed against the event bus of vue2, you can click https://v2.cn.vuejs.org/v2/api/#vm -On for more information

You can also use it in multiple javascript modules, just point your reference to the same instance