vue 子组件向父组件传值方法

<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);  } }