javascript计算不计算

基本上，我需要修复这个脚本，我试图修复它，但它返回-1天。 您可以在这里看到新脚本-

function calculatePrice(startDate, endDate, bike) {                           
    if(cars != "no") {
      console.log(startDate);
      console.log(endDate);
      var currentSeason = getSeason(startDate);
      var totalPrice = 0;
      var daysInSeason = 0;
      var currentDate = startDate;         
      var tierss = "";     
      var now = startDate;           
      var daye = 0;
      while(now <= endDate) {
        var season = getSeason(currentDate);
        daye++;
        now.setDate(now.getDate() + 1);    
      }
      if(daye <= 3) tierss = "t1";
      else if (daye <= 8) tierss = "t2";
      else tierss = "t3"                                    
      while (currentDate <= endDate) {                     
          var season = getSeason(currentDate);
          if (season != currentSeason) {
              totalPrice += getPrice(bike, currentSeason, daysInSeason, tierss);
              currentSeason = season;
              daysInSeason = 0;
          }
          daysInSeason++;
          console.log('days in season - ' + daysInSeason);
          currentDate.setDate(currentDate.getDate() + 1);
      }                                                
      totalPrice += getPrice(bike, currentSeason, daysInSeason, tierss);
      return totalPrice;
    }
    else {
      totalPrice = 0;
      return totalPrice;
    }
}

函数计算价格（开始日期、结束日期、自行车）{
如果（汽车！=“否”）{
控制台日志（起始日期）；
console.log（endDate）；
var currentSeason=getSeason（起始日期）；
var totalPrice=0；
var daysInSeason=0；
var currentDate=起始日期；
var tierss=“”；
var now=起始日期；
var-daye=0；
而（now如果“now”和“startDate”是对象，那么每次调用

现在。设置日期（某物）

您还可以更改startDate…因为now和startDate是指向同一对象的指针

我不确定这是否导致了您的错误，因为我不知道您在哪里使用startDate…但它可能会在调用方中更改它，例如

编辑：是的，这就是你的问题，currentDate、now和startDate都指向同一个日期对象——因此你的第二个while循环永远不会执行。
你能帮我解决这个问题吗？
function calculatePrice(startDate, endDate, bike) {                           
  if(cars != "no") {
    console.log(startDate);
    console.log(endDate);
    var currentSeason = getSeason(startDate);
    var totalPrice = 0;
    var daysInSeason = 0;
    var currentDate = startDate;
    while (currentDate <= endDate) {
        var season = getSeason(currentDate);
        if (season != currentSeason) {
            totalPrice += getPrice(bike, currentSeason, daysInSeason);
            currentSeason = season;
            daysInSeason = 0;
        }
        daysInSeason++;
        currentDate.setDate(currentDate.getDate() + 1);
    }
    totalPrice += getPrice(bike, currentSeason, daysInSeason);
    return totalPrice;
  }
  else {
    totalPrice = 0;
    return totalPrice;
  }
}