在日期列表中查找最近的过去日期

function findNearestPastDate(dateList) {
  var currentDate = new Date();
  var nearestPastDate = dateList[0];

  for (var i = 0; i < dateList.length; i++) {
    var date = new Date(dateList[i]);

    if (date < currentDate && date > nearestPastDate) {
      nearestPastDate = date;
    }
  }

  return nearestPastDate;
}

// 示例用法
var dates = ["2022-01-01", "2022-02-01", "2022-03-01", "2022-04-01"];
var nearestPastDate = findNearestPastDate(dates);
console.log(nearestPastDate);