js 随机生成时间段

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data() {
  return {
     thatTime: 0, // 获取要计算的开始时间
     inputNumber: "", // 需要生成的数量
     dataValue:  null,// 时间段
     // 时间的占比
     scale1: "10",
     scale2: "20",
     scale3: "30",
     scale4: "40",
     // 生成的时间列表
     list: []
   };
}

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// 获取几天
let date = Date.parse(this.dataValue[1]) - Date.parse(this.dataValue[0]);
let day = date / 1000 / 60 / 60 / 24 + 1;

// 划分每天的数量
let dayNum = this.inputNumber / day;

this.thatTime = Date.parse(this.dataValue[0]);

for (let index = 0; index < day; index++) {
  // 循环每一天，将每天需要生成的数量和当前的天数传入
  this.getDateFun(dayNum, index)
}

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getDateFun(dayNum, index) {
  let arr = [];
  for (let i = 0; i < dayNum; i++) {
    let endMe = 0;
    let me = 1000 * 60 * 60;
    if (i <= (Number(this.scale1) / 100) * dayNum) {
      // 0~6
      me *= 6;
    } else if (
      i > (Number(this.scale1) / 100) * dayNum &&
      i <= ((Number(this.scale2) + Number(this.scale1)) / 100) * dayNum
    ) {
      // 6~12
      endMe = 1000 * 60 * 60 * 6;
      me *= 12;
    } else if (
      i > ((Number(this.scale2) + Number(this.scale1)) / 100) * dayNum &&
      i <=
        ((Number(this.scale2) + Number(this.scale1) + Number(this.scale3)) /
          100) *
          dayNum
    ) {
      // 12~18
      endMe = 1000 * 60 * 60 * 12;
      me *= 18;
    } else if (
      i >
        ((Number(this.scale2) + Number(this.scale1) + Number(this.scale3)) /
          100) *
          dayNum &&
      i <= dayNum
    ) {
      // 18~24
      endMe = 1000 * 60 * 60 * 18;
      me *= 24;
    }

    // 插入
    // randomNum 生成随机数的区间
    var date = new Date(this.randomNum(endMe, me) + this.thatTime);
    var Y = date.getFullYear() + "-";
    var M =
      (date.getMonth() + 1 < 10
        ? "0" + (date.getMonth() + 1)
        : date.getMonth() + 1) + "-";
    var D = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
    var h = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
    var m =
      date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
    var s =
      date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
    arr.push(Y + M + D + " " + h + ":" + m + ":" + s);
  }
  console.log(arr);

  this.list.push(arr.sort());
  console.log(this.list);

  this.thatTime += 86400000;
}

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randomNum(lowerValue, upperValue) {
      return Math.floor(
        Math.random() * (upperValue - lowerValue + 1) + lowerValue
      );
 }