vue 子组件向父组件传值

<component-a  v-on:child-say="listenToMyBoy"></component-a>

<p>Do you like me? {{childWords}}</p>

 methods: {

            listenToMyBoy: function (somedata){

              this.childWords = somedata

            }

        }

<button v-on:click="onClickMe">like!</button>

 

methods: {

      onClickMe: function(){

        this.$emit(‘child-say‘,this.somedata);

      }