解决Vue2.x父组件与子组件之间的双向绑定问题

<template> 
 <div class="ne-ipt"> 
  <input type="text" v-model="currentValue"> 
 </div> 
</template> 
 
<style lang="less" scoped> 
 @import "../../assets/styles/form/form.less"; 
</style> 
<script> 
 export default { 
  name: 'NeIpt', 
  props: { 
   // 接收一个由父级组件传递过来的值 
   value: { 
    type: String, 
    default: function () { 
     return '' 
    } 
   } 
  }, 
  computed:{ 
   currentValue: { 
    // 动态计算currentValue的值 
    get:function() { 
     return this.value; // 将props中的value赋值给currentValue 
    }, 
    set:function(val) { 
     this.$emit('input', val); // 通过$emit触发父组件 
    } 
   } 
  } 
 } 
</script> 

<template> 
 <div id="button-index"> 
  <ne-ipt placeholder="姓名" v-model="test"></ne-ipt> 
 </div> 
</template> 
<style> 
</style> 
<script> 
 import NeIpt from './NeIpt' 
 export default { 
  name: 'form-index', 
  data () { 
   return { 
    test: '' 
   } 
  }, 
  components: { 
   NeIpt 
  } 
 } 
</script>