vue3根据年月日算出是星期几

onMounted(() => {

  getWeekDayByDate("20240114")

})

function getWeekDayByDate(yyyymmdd) {

  let y = yyyymmdd.substring(0, 4);

  let m = yyyymmdd.substring(4, 6);

  let d = yyyymmdd.substring(6);

  var myDate = new Date();

  myDate.setFullYear(y, m - 1, d);

  var week = myDate.getDay()

  console.log(week);

  switch (week) {

    case 0:

      return '周日';

    case 1:

      return '周一';

    case 2:

      return '周二';

    case 3:

      return '周三';

    case 4:

      return '周四';

    case 5:

      return '周五';

    case 6:

      return '周六';

  }

}