按月-年和周-年Javascript对数组进行排序

const arr = [5, 1, 3, 2, 4];
arr.sort((a, b) => a - b);
console.log(arr); // 输出：[1, 2, 3, 4, 5]

const arr = [5, 1, 3, 2, 4];
arr.sort((a, b) => b - a);
console.log(arr); // 输出：[5, 4, 3, 2, 1]

const arr = ["2022-02", "2021-03", "2022-01", "2021-02", "2021-01"];
arr.sort((a, b) => {
  const [yearA, monthA] = a.split('-');
  const [yearB, monthB] = b.split('-');
  if (yearA !== yearB) {
    return yearA - yearB;
  } else {
    return monthA - monthB;
  }
});
console.log(arr); // 输出：["2021-01", "2021-02", "2021-03", "2022-01", "2022-02"]

// 获取日期所在年的第几周
Date.prototype.getWeek = function() {
  const date = new Date(this.getTime());
  date.setHours(0, 0, 0, 0);
  date.setDate(date.getDate() + 4 - (date.getDay() || 7));
  const yearStart = new Date(date.getFullYear(), 0, 1);
  const weekNo = Math.ceil(((date - yearStart) / 86400000 + 1) / 7);
  return weekNo;
}

const arr = ["2021-02-01", "2021-01-01", "2022-01-01", "2021-03-01", "2022-02-01"];
arr.sort((a, b) => {
  const dateA = new Date(a);
  const dateB = new Date(b);
  const yearA = dateA.getFullYear();
  const yearB = dateB.getFullYear();
  const weekA = dateA.getWeek();
  const weekB = dateB.getWeek();
  if (yearA !== yearB) {
    return yearA - yearB;
  } else {
    return weekA - weekB;
  }
});
console.log(arr); // 输出：["2021-01-01", "2021-02-01", "2021-03-01", "2022-01-01", "2022-02-01"]