关于javascript:判断某个时间戳是否在当前时间北京时区的临近三个工作日内

function isWithinThreeWorkingDays(targetTimestamp) {  // 将指标工夫戳调整到北京时区  var targetTimeInBeijing = targetTimestamp + 8 * 60 * 60 * 1000;  // 获取以后工夫的工夫戳，并调整到北京时区  var currentTime = new Date().getTime();  var currentTimeInBeijing = currentTime + 8 * 60 * 60 * 1000;  // 获取指标日期的年、月、日  var targetDate = new Date(targetTimeInBeijing);  var targetYear = targetDate.getFullYear();  var targetMonth = targetDate.getMonth();  var targetDay = targetDate.getDate();  // 获取以后日期的年、月、日  var currentDate = new Date(currentTimeInBeijing);  var currentYear = currentDate.getFullYear();  var currentMonth = currentDate.getMonth();  var currentDay = currentDate.getDate();  // 计算以后工夫与指标工夫的天数差  var dayDiff = Math.floor((targetTimeInBeijing - currentTimeInBeijing) / (24 * 60 * 60 * 1000));  // 判断是否在以后工夫的邻近三个工作日内  if (currentYear === targetYear && currentMonth === targetMonth) {    var targetWeekday = targetDate.getDay();    var currentWeekday = currentDate.getDay();    // 判断指标日期是否为周六或周日    if (targetWeekday !== 0 && targetWeekday !== 6) {      // 判断以后日期是否为周六或周日      if (currentWeekday !== 0 && currentWeekday !== 6) {        var remainingDays = targetDay - currentDay;        // 判断是否在邻近三个工作日内        if (remainingDays >= 0 && remainingDays <= 3) {          return true;        }      } else if (currentWeekday === 6 && dayDiff <= 2) {        return true;      } else if (currentWeekday === 0 && dayDiff <= 1) {        return true;      }    } else if (targetWeekday === 6 && dayDiff <= 1) {      return true;    } else if (targetWeekday === 0 && dayDiff === 0) {      return true;    }  } else if (currentYear === targetYear && currentMonth === targetMonth - 1) {    var remainingDaysInCurrentMonth = new Date(currentYear, currentMonth + 1, 0).getDate() - currentDay;    var remainingDaysInTargetMonth = targetDay;    // 判断是否在邻近三个工作日内（逾越周末）    if (remainingDaysInCurrentMonth + remainingDaysInTargetMonth <= 3) {      return true;    }  }  return false;}// 示例应用var timestamp = 1677635721000; // 给定的工夫戳，2023-06-29 16:35:21var result = isWithinThreeWorkingDays(timestamp);console.log(result);