<el-form-item label="考试开始时间:" prop="examStartTime">
        <el-date-picker v-model="createExam.examStartTime" type="datetime" placeholder="选择日期时间"
          format="yyyy-MM-dd HH:mm:ss" value-format="yyyy-MM-dd HH:mm:ss" @change="test"
          :picker-options="pickerOptions">
        </el-date-picker>
      </el-form-item>
      <el-form-item label="考试结束时间:" width="100px" prop="examEndTime">
        <el-date-picker type="datetime" v-model="createExam.examEndTime" placeholder="选择日期时间"
          value-format="yyyy-MM-dd HH:mm:ss" format="yyyy-MM-dd HH:mm:ss" @change="test"
          :picker-options="pickerOptions">
        </el-date-picker>
      </el-form-item>

js代码：

data(){
    return{
        pickerOptions:{
            disabledDate (time) {
            return time.getTime() < Date.now() - 8.64e7;
            },
        }
    }
}