el-date-picker与el-time-picker的时间格式设置代码

  <el-form-item label="Activity time">
        <el-col :span="8">
          <el-date-picker v-model="form.date1" :format="'yyyy-MM-DD'" value-format="yyyy-MM-dd" type="date" placeholder="Pick a date" style="width: 100%;" />
        </el-col>
        <el-col :span="3" class="line">-</el-col>
        <el-col :span="8">
          <el-time-picker v-model="form.date2" :format="'HH:mm'" value-format="HH:mm" type="fixed-time" placeholder="Pick a time" style="width: 100%;" />
        </el-col>
      </el-form-item>
      <el-form-item label="Is Active" prop="isActic">
        <el-switch v-model.trim="form.isActic" name="isActic"/>
      </el-form-item>    

<el-date-picker
                class="topfontstyle"
                v-model="listMain.time"
                type="daterange"
                value-format="yyyy-MM-dd HH:mm:ss"
                range-separator="至"
                start-placeholder="开始日期"
                end-placeholder="结束日期">
        </el-date-picker>