Vue组件内部实现一个双向数据绑定的实例代码

import Vue from 'vue'const component = {  props: ['value'],   template: `    <div>      <input type="text" @input="handleInput" :value="value">    </div>  `,   data () {     return{}   },   methods: {    handleInput (e) {      this.$emit('input', e.target.value)    }  }}new Vue({  components: {    CompOne: component   },   el: '#root',   template: `    <div>     <comp-one :value1="value" @input="value = arguments[0]"></comp-one>    </div>   `, data () {  return{    value: '123'  } }})