查找两个日期之间的差异(周末除外)

function getWeekdayDifference(startDate, endDate) {
  const oneDay = 24 * 60 * 60 * 1000; // 一天的毫秒数
  let diffDays = 0;

  // 将日期字符串转换为Date对象
  const start = new Date(startDate);
  const end = new Date(endDate);

  // 计算两个日期之间的天数差异
  const diffTime = Math.abs(end - start);
  diffDays = Math.round(diffTime / oneDay);

  // 排除周末的天数差异
  const startDay = start.getDay();
  const endDay = end.getDay();
  const weekendDays = Math.floor((diffDays + startDay) / 7) * 2;

  // 如果起始日期是周末，减去一个周末天数
  if (startDay === 6) {
    weekendDays--;
  } else if (startDay === 0) {
    weekendDays -= 2;
  }

  // 如果结束日期是周末，减去一个周末天数
  if (endDay === 6) {
    weekendDays--;
  } else if (endDay === 0) {
    weekendDays -= 2;
  }

  // 计算最终的工作日差异
  const weekdayDiff = diffDays - weekendDays;

  return weekdayDiff;
}

// 示例用法
const startDate = '2022-01-01';
const endDate = '2022-01-10';
const weekdayDiff = getWeekdayDifference(startDate, endDate);
console.log('工作日差异:', weekdayDiff);