如何在 JavaScript 中計算兩個日期之間的月份數？

計算JavaScript 中兩個日期之間的月份數

計算JavaScript 中兩個Date() 物件之間的月份差異需要了解定義「相差的月份數。」

方法：

要獲得該值，您可以從每個日期物件。使用這些值，您可以根據您的具體解釋計算兩個日期之間的月數。

範例程式碼：

一種方法是將差異視為全年的月數差異加上月份數字之間的差異（根據上個月的偏移量進行調整）。

<code class="javascript">function monthDiff(d1, d2) {
    var months;
    months = (d2.getFullYear() - d1.getFullYear()) * 12;
    months -= d1.getMonth();
    months += d2.getMonth();
    return months <= 0 ? 0 : months;
}</code>

用法範例：

The以下程式碼片段示範了monthDiff函數的用法：

<code class="javascript">// Calculate month difference between November 4th, 2008, and March 12th, 2010
var diff = monthDiff(new Date(2008, 10, 4), new Date(2010, 2, 12));
console.log(diff); // Output: 16

// Calculate month difference between January 1st, 2010, and March 12th, 2010
diff = monthDiff(new Date(2010, 0, 1), new Date(2010, 2, 12));
console.log(diff); // Output: 2

// Calculate month difference between February 1st, 2010, and March 12th, 2010
diff = monthDiff(new Date(2010, 1, 1), new Date(2010, 2, 12));
console.log(diff); // Output: 1</code>

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