JavaScript中两个日期的月份差异:

 start_date = new Date(year, month, day); //Create start date object by passing appropiate argument
 end_date = new Date(new Date(year, month, day)

从start_date到end_date的总月份:

 total_months = (end_date.getFullYear() - start_date.getFullYear())*12 + (end_date.getMonth() - start_date.getMonth())

#这是我写的一段很好的代码，用于获取天数和月份 从给定日期开始

把你的手

/** * Date a end day * Date b start day * @param DateA Date @param DateB Date * @returns Date difference */ function getDateDifference(dateA, DateB, type = 'month') { const END_DAY = new Date(dateA) const START_DAY = new Date(DateB) let calculatedDateBy let returnDateDiff if (type === 'month') { const startMonth = START_DAY.getMonth() const endMonth = END_DAY.getMonth() calculatedDateBy = startMonth - endMonth returnDateDiff = Math.abs( calculatedDateBy + 12 * (START_DAY.getFullYear() - END_DAY.getFullYear()) ) } else { calculatedDateBy = Math.abs(START_DAY - END_DAY) returnDateDiff = Math.ceil(calculatedDateBy / (1000 * 60 * 60 * 24)) } const out = document.getElementById('output') out.innerText = returnDateDiff return returnDateDiff } // Gets number of days from given dates /* getDateDifference('2022-03-31','2022-04-08','day') */ // Get number of months from given dates getDateDifference('2021-12-02','2022-04-08','month') <div id="output"> </div>

我知道这真的很晚了，但还是把它贴出来，以防它能帮助到其他人。下面是我想出的一个函数，它似乎很好地计算了两个日期之间的月份差异。不可否认，这个方法比克劳德的方法要粗俗得多，但通过遍历日期对象提供了更准确的结果。它是在AS3中，但你应该能够放弃强类型，你会有JS。请随意让大家看起来更漂亮!

    function countMonths ( startDate:Date, endDate:Date ):int
    {
        var stepDate:Date = new Date;
        stepDate.time = startDate.time;
        var monthCount:int;

        while( stepDate.time <= endDate.time ) { 
            stepDate.month += 1;
            monthCount += 1;
        }           

        if ( stepDate != endDate ) { 
            monthCount -= 1;
        }

        return monthCount;
    }

下面是另一种更少循环的方法:

calculateTotalMonthsDifference = function(firstDate, secondDate) {
        var fm = firstDate.getMonth();
        var fy = firstDate.getFullYear();
        var sm = secondDate.getMonth();
        var sy = secondDate.getFullYear();
        var months = Math.abs(((fy - sy) * 12) + fm - sm);
        var firstBefore = firstDate > secondDate;
        firstDate.setFullYear(sy);
        firstDate.setMonth(sm);
        firstBefore ? firstDate < secondDate ? months-- : "" : secondDate < firstDate ? months-- : "";
        return months;
}

下面的代码片段帮助我找到两个日期之间的月份

找到两个日期之间的月份计数JS

两个日期之间的月份 代码片段

function diff_months_count(startDate, endDate) {
    var months;
    var d1 = new Date(startDate);
    var d2 = new Date(endDate);
    months = (d2.getFullYear() - d1.getFullYear()) * 12;
    months -= d1.getMonth();
    months += d2.getMonth();
    return months <= 0 ? 0 : months;
}

它还计算天数并以月为单位进行转换。

function monthDiff(d1, d2) {
    var months;
    months = (d2.getFullYear() - d1.getFullYear()) * 12;   //calculates months between two years
    months -= d1.getMonth() + 1; 
    months += d2.getMonth();  //calculates number of complete months between two months
    day1 = 30-d1.getDate();  
    day2 = day1 + d2.getDate();
    months += parseInt(day2/30);  //calculates no of complete months lie between two dates
    return months <= 0 ? 0 : months;
}

monthDiff(
    new Date(2017, 8, 8), // Aug 8th, 2017    (d1)
    new Date(2017, 12, 12)  // Dec 12th, 2017   (d2)
);
//return value will be 4 months