如何在使用公式提取日期时计算两个日期之间的差异

function getDateDifference(dateA, dateB) {
  // 将日期字符串转换为日期对象
  var a = new Date(dateA);
  var b = new Date(dateB);

  // 计算差异的年份、月份、天数
  var yearDiff = b.getFullYear() - a.getFullYear();
  var monthDiff = b.getMonth() - a.getMonth();
  var dayDiff = b.getDate() - a.getDate();

  // 处理差异结果
  var result = "";
  if (yearDiff > 0) {
    result += yearDiff + "年";
  }
  if (monthDiff > 0) {
    result += monthDiff + "个月";
  }
  if (dayDiff > 0) {
    result += dayDiff + "天";
  }

  return result;
}

// 示例用法
var dateA = "2021-01-01";
var dateB = "2022-02-15";
var difference = getDateDifference(dateA, dateB);
console.log("日期差异：" + difference);