vue问题五：element ui组件的开始时间-结束时间验证

<el-date-picker  v-model="seach.before" type="date" placeholder="开始时间"  value-format="yyyy-MM-dd" class="wida" :picker-options="pickerBeginDateBefore"  @change="changeTime">
</el-date-picker>
    <span class="zhi">至</span>
<el-date-picker   v-model="seach.after" type="date" placeholder="结束时间"value-format="yyyy-MM-dd" class="wida" :picker-options="pickerBeginDateAfter">
</el-date-picker>

template中

2021-11-09
2022-12-23
2021-07-28
2022-12-23
2022-12-23
2021-05-31
2022-12-23
2022-12-23