如何获取今天是星期几？

getTodayIsWeekday():string {
  const daysOfWeek = ['星期天', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'];
  const today = new Date();
  const dayIndex = today.getDay();
  return daysOfWeek[dayIndex];
}