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'
  }
 }
})