javascript - vue封装饿了吗element-ui的时间控件el-date-picker报错(v-model组件封装)

问题描述

问 题

封装饿了吗element-ui的timepicker时候出现如下错误：

[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "value" 
(found in <ElInput>)
warn @ vue.js?1a2a:564
(anonymous) @ vue.js?1a2a:2699
reactiveSetter @ vue.js?1a2a:864
updateChildComponent @ vue.js?d304:2468
prepatch @ vue.js?d304:3343
patchVnode @ vue.js?d304:5136
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
updateChildren @ vue.js?d304:5064
patchVnode @ vue.js?d304:5147
patch @ vue.js?d304:5271
Vue._update @ vue.js?d304:2303
updateComponent @ vue.js?d304:2419
get @ vue.js?d304:2756
run @ vue.js?d304:2826
flushSchedulerQueue @ vue.js?d304:2595
(anonymous) @ vue.js?d304:658
nextTickHandler @ vue.js?d304:605
vue.js?1a2a:564 [Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "readonly" 
(found in <ElInput>)

封装代码如下：

<template>
  <div class="block">
    <span class="demonstration">时间</span>
    <el-date-picker
      v-model="date"
      type="datetimerange"
      placeholder="Select time range">
    </el-date-picker>
  </div>
</template>

<script>
  export default {
    name:"timepicker",
    data(){
        return{
            date:this.dateValue
        }
    },
    props: {
      dateValue: Array
    },
    computed:{
    }
  }
</script>

使用如下：

<timepicker :date-value="date"></timepicker>

当点击时间控件选择时间的时候，就会报错，不点击没问题。
求大神帮看下如何封装带v-model的组件。

解决方案

这种错误是vue2.0里有的，意思是你修改了父组件传过来得值，你已经使用data代替了，所以不是这个地方出的问题，难道是传到elementUI时出的问题？你不给date赋值dateValue，用当前页面自己定义的数据呢？还会有这个问题吗？

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