vue 兄弟组件相互通信

import Vue from ‘vue‘
export default new Vue()

<template>
    <div>
        <span>A组件->{{msg}}</span>
        <input type="button" value="把a组件数据传给b" @click ="send">
    </div>
</template>
<script>
import vmson from "../../../util/emptyVue"
export default {
    data(){
        return {
            msg:{
                a:‘111‘,
                b:‘222‘
            }
        }
    },
    methods:{
        send:function(){
            vmson.$emit("aevent",this.msg)
        }
    }
}
</script>

<template>
 <div>
    <span>b组件,a传的的数据为->{{msg}}</span>
 </div>
</template>
<script>
      import vmson from "../../../util/emptyVue"
      export default {
         data(){
                return {
                    msg:""
                }
            },
         mounted(){
                vmson.$on("aevent",this.getEvnt)
        },
    methods:{
      getEvnt(val){
        console.log(val);
      }
    }
    }
</script>

<template>
     <div>
      <childa></childa>    
      <br />
      <childb></childb>      
     </div>
</template>
<script>
   import childa from ‘./childa.vue‘;
   import childb from ‘./childb.vue‘;
   export default {
       components:{
           childa,
           childb
       },
       data(){
           return {
               msg:""
           }
       },
       methods:{
           
       }
   }
</script>