关于vue.js:Vue-thisrefs的使用

<template>  <div class="hello">    <h1>{{ msg }}</h1>    <div id="test" ref="div1">        <input type="text" ref="input1" name="name" />        <button @click="add">增加</button>    </div>    </div></template><script>export default {  name: 'HelloWorld',  data () {    return {      msg: 'Welcome to Your Vue.js App'    }  },  methods:{      add(){        // this.$refs.input1.value  = '22';        let input1 = this.$refs.input1;        let div1 = this.$refs.div1;        console.log(input1,div1);      }    }}