input 时间字段默认值

背景：

时间字段展示默认值，开始时间为当天 0点，结束时间为当天晚上12点

代码：

 <input style="Width: 180px;float:left ;" type="date" id="start_time"
  name="start_time" placeholder="请选择具体时间"   data-format="YYYY-MM-DD HH:mm"/>
 <input style="Width: 180px;float:left ;" type="date" id="end_time"
  name="end_time" placeholder="请选择具体时间"  data-format="YYYY-MM-DD HH:mm"/>

 <script type="text/javascript">
     //时间默认值，默认当前时间
     var dataCur = new Date();
     var dataYMD = dataCur.getFullYear() + '-' + (dataCur.getMonth() + 1) + '-' + (dataCur.getDate())
     var dataStart = dataYMD+' 00:00'
     var dataEnd = dataYMD+' 23:59'
     $('#start_time').val(dataStart);
     $('#end_time').val(dataEnd);
     </script>

vue中写法

 <template>
     <div>
         <el-row style="height:30px" type="flex">
             <el-col :span="12">
                 <el-form-item label="开始时间" required>
                     <el-date-picker type="date" format="yyyy-MM-dd" value-format="yyyy-MM-dd" clearable
                                     placeholder="选择日期" v-model="form.loadDate"
                                     style="width:140px;"></el-date-picker>
                     <el-time-picker type="fixed-time" format="HH:mm:ss" value-format="HH:mm:ss" clearable
                                     placeholder="选择时间" v-model="form.loadTime" style="width:120px;"
                     ></el-time-picker>
                 </el-form-item>
             </el-col>
             <el-col :span="12">
                 <el-form-item label="结束时间" required>
                     <el-date-picker type="date" format="yyyy-MM-dd" value-format="yyyy-MM-dd" clearable
                                     placeholder="选择日期" v-model="form.unloadDate"
                                     style="width:140px;"></el-date-picker>
                     <el-time-picker type="fixed-time" format="HH:mm:ss" value-format="HH:mm:ss" clearable
                                     placeholder="选择时间" v-model="form.unloadTime"
                                     style="width:120px;"></el-time-picker>
                 </el-form-item>
             </el-col>
         </el-row>
     </div>
 </template>
 <script>
     //时间默认值，默认当前时间+1天
     var dataCur = new Date();
     var dataDef = dataCur.getFullYear() + '-' + (dataCur.getMonth() + 1) + '-' + (dataCur.getDate() + 1)

     export default {
         data() {
             return {
                 form: {
                     loadDate: dataDef,
                     loadTime: '8:00:00',
                     unloadDate: dataDef,
                     unloadTime: '20:00:00',
                 }
             };
         },

         methods: {},

     };
 </script>