vue的子组件向父组件传递消息

子组件

<script>
export default {
  name: 'componentA',
  data () {
    return {
      msg: 'msg from componentA',
      message:'',
    }
  },
  props:['msgfromfather'],
  methods:{
    clickme:function(){
      // console.log(this.msgfromfather),
      this.$emit("child-tell-me-something",this.msg);
    }
  }
}
</script>

父组件

<template>
  <div id="app">
    <p>{{msg}}</p>
    <component-a msgfromfather='you die' 
    v-on:child-tell-me-something='listenToMyBoy' ></component-a>
    <p>child say :{{childWords}}</p>
  </div>
</template>

<script>
  import componentA from "./components/componentA"

  export default{
    data:function(){
      return {
        msg:'father',
        childWords:'',
      }
    },
    components:{componentA},
    methods:{
      listenToMyBoy:function(hehe){
        
        console.log(hehe+'')
        this.childWords = hehe
      }
    }
  }
</script>