Vue中bus的使用详解

// utils - bus.js
import Vue from 'vue'
const bus = new Vue()
export default bus 

import bus from '@/utils/bus'

us.$emit('message', 'hello');

import bus from '@/utils/bus'

bus.$on('message', (e) => {
 console.log(e)
})

import bus from '@/utils/bus'
mounted () { 
 bus.$on('testA', this.testA) 
},
testA () {
 console.log('由A组件调用')
}

import bus from '@/utils/bus'
mounted () {
 bus.$emit('testA')
}