<el-date-picker
            size="mini"
            v-model="dateTime"
            value-format="yyyy-MM-dd HH:mm:ss"
            type="datetimerange"
            range-separator="~"
            start-placeholder="开始日期"
            end-placeholder="结束日期"
            :picker-options="pickerOptions"
          />

 限制选择今天之前的时间，并且只能选择一天                

data() {
    return {

        pickerMinDate: '',
      pickerOptions: {
        onPick: (pick) => {
          this.pickerMinDate = pick; //获取当前选择日期
        },
        disabledDate: (date) => {
          const timeStamp = 24 * 60 * 60 * 1000; //1天的时间戳
          const