VUE兄弟组件传值操作实例分析

import Vue from 'vue';
export default new Vue();

<template>
<ponents-a></ponents-a>
<ponents-b></ponents-b>
</template>

<template>
<div class="ponents-a">
<button @click="abtn">A按钮</button>
</div>
</template>
<script>
import eventVue from '../../js/eventVue.js'
export default {
name: 'app',
data () {
return {
'msg':"我是组件A"
}
},
methods:{
abtn:function(){
eventVue.$emit("myFun",this.msg) //$emit这个方法会触发一个事件
}
}
}
</script>

<template>
<div class="ponents-a">
<div>{{btext}}</div>
</div>
</template>
<script>
import eventVue from '../../js/event.js'
export default {
name: 'app',
data () {
return {
'btext':"我是B组件内容"
}
},
created:function(){
this.bbtn();
},
methods:{
bbtn:function(){
eventVue.$on("myFun",(message)=>{ //这里最好用箭头函数，不然this指向有问题
this.btext = message
})
}
}
}
</script>