检查所选日期值是否比今天的日期大至少一个月

Question

我正在尝试编写一个函数来检查输入类型月份标签中的选定日期是否比当前日期大至少一个月。 但是当我比较这些值时，我的功能不起作用，因为它正在比较错误的数字。 这是我尝试过的：

    function validateDate(date) {
    var date = new Date(date);
    var now = new Date();
    now.setHours(0,0,0,0);
    alert(date);

    if(date.getFullYear() < now.getFullYear()){
        alert("date selected is less than todays year")
        return false;
    }
    else{
        if(date.getFullYear() === now.getFullYear()){
            var nowMonth = now.getMonth();
            var dateMonth = date.getMonth();

            if(dateMonth <= nowMonth){
                alert("date selected is less than or equal to todays"+ nowMonth + dateMonth)
                return false;
            }
            else{
                return true;
            }
        }else{
            return true;
        }
    }}

这是我的日期选择器：

但问题是，当我使用它来获取日期时：

        var nowMonth = now.getMonth();
        var dateMonth = date.getMonth();

January == 11
February == 0
March == 1
April == 2
etc...

我怎样才能解决这个问题？

Answer 1

我已经在jsfiddle上尝试了它，它不会像你选择的变量名一样

    function validateDate(dateselect) {
  var datenew = new Date(dateselect);
  var nowdate = new Date();
  nowdate.setHours(0, 0, 0, 0);

  if (datenew.getFullYear() < nowdate.getFullYear()) {
    alert("date selected is less than todays year")
    return false;
  } else {
    if (datenew.getFullYear() === nowdate.getFullYear()) {
      var nowMonth = nowdate.getMonth();
      var dateMonth = datenew.getMonth();
alert(nowMonth + ' ' + dateMonth);

      if (dateMonth <= nowMonth) {
        alert("date selected is less than or equal to todays" + nowMonth + dateMonth)
        return false;
      } else {
        return true;
      }
    } else {
      return true;
    }
  }
}

现在它显示5和5尝试它https://jsfiddle.net/5zwktasn/