JS 获取本周、最近一周、上月

本周

function getThisWeek() {
  let start = new Date();
  let end =  new Date();
  const now = new Date("2022-02-26 00:00:00");
  let day = now.getDay();
  console.log(day)
  let minusDay = day !== 0 ? day - 1 : 6;
  start.setTime(now.getTime() - 3600 * 1000 * 24 * minusDay);
  end.setTime(now.getTime() + 3600 * 1000 * 24 * (6 - minusDay));
  start.setHours(0, 0, 0);
  end.setHours(23, 59, 59);
  return start.toLocaleDateString() + " - " + end.toLocaleDateString();
}

// 获取最近一周

function getRecentWeek() {
  const end = new Date();
  const start = new Date();
  start.setTime(start.getTime() - 3600 * 1000 * 24 * 6);
  return start.toLocaleDateString() + " - " + end.toLocaleDateString();
}

console.log(getRecentWeek());

获取上个月

function getPreviousMonth() {
  let start = null;
  let end = null;
  const now = new Date('2023/1/2 00:00:00');
  let year = now.getFullYear();
  let month = now.getMonth();
  if (month === 0) {
    month = 12;
    year = year - 1;
  }
  if (month < 10) {
    month = "0" + month;
  }
  const yDate = new Date(year, month, 0);
  start = new Date( year + '-' + month + '-' + '01 00:00:00'); //上个月第一天
  end = new Date( year + '-' + month + '-' + yDate.getDate() + ' 23:59:59'); //上个月最后一天
  return start.toLocaleDateString() + " - " + end.toLocaleDateString();
}

console.log(getPreviousMonth())