ElementUi data-picker 限制开始结束日期关系

    pickerOptionsStart: {
        disabledDate: (time) => {
          if (this.searchData.end_at) {
            var endTime = new Date(this.searchData.end_at).valueOf();
          }

          return time.valueOf() > endTime;
        },
      },
      pickerOptionsEnd: {
        disabledDate: (time) => {
          if (this.searchData.start_from) {
            // 让用户可以选择开始结束同一天
            var startTime =
              new Date(this.searchData.start_from).valueOf() - 8.64e7 + 1;
          } else {
            var startTime;
          }
          return time && time.valueOf() < startTime;
        },
      },