如何使用moment.js计算Javascript中两个日期之间的“工作日”数？答案

【问题标题】：How to calculate Number of 'Working days' between two dates in Javascript using moment.js?如何使用moment.js计算Javascript中两个日期之间的“工作日”数？
【发布时间】：2015-04-10 02:23:01
【问题描述】：

如何使用 moment.js 在 JavaScript 中计算两个日期之间的工作日数。我有一个计算这些天的工作公式，但该公式并不满足所有条件：

这是我的代码：

var start= moment(data[x].start_date);
                var end= moment(data[x].est_end_date);
                var difference= end.diff(start, 'days');
                var workingDays= Math.round((difference/7)*5);
//data[x] is for iterating over a loop

我在这里每 7 天得到 5 天，因为星期六和星期日被视为非工作日，但是如果从星期日或星期六开始计算天数，则此公式将失败。

请任何人在这方面提供帮助，必须进行必要的更改以避免此问题。

【问题讨论】：

标签： javascript date formula momentjs

【解决方案1】：

只需将其分为 3 部分.. 第一周、上周和中间的部分，如下所示：

function workday_count(start,end) {
  var first = start.clone().endOf('week'); // end of first week
  var last = end.clone().startOf('week'); // start of last week
  var days = last.diff(first,'days') * 5 / 7; // this will always multiply of 7
  var wfirst = first.day() - start.day(); // check first week
  if(start.day() == 0) --wfirst; // -1 if start with sunday 
  var wlast = end.day() - last.day(); // check last week
  if(end.day() == 6) --wlast; // -1 if end with saturday
  return wfirst + Math.floor(days) + wlast; // get the total
} //              ^ EDIT: if days count less than 7 so no decimal point

测试代码

var ftest = {date:'2015-02-0',start:1,end:7};
var ltest = {date:'2015-02-2',start:2,end:8};
var f = 'YYYY-MM-DD';
for(var z=ftest.start; z<=ftest.end; ++z) {
  var start = moment(ftest.date + z);
  for(var y=ltest.start; y<=ltest.end; ++y) {
    var end = moment(ltest.date + y);
    var wd = workday_count(start,end);
    console.log('from: '+start.format(f),'to: '+end.format(f),'is '+wd+' workday(s)');
  }
}

测试代码的输出：

from: 2015-02-01 to: 2015-02-22 is 15 workday(s)
from: 2015-02-01 to: 2015-02-23 is 16 workday(s)
from: 2015-02-01 to: 2015-02-24 is 17 workday(s)
from: 2015-02-01 to: 2015-02-25 is 18 workday(s)
from: 2015-02-01 to: 2015-02-26 is 19 workday(s)
from: 2015-02-01 to: 2015-02-27 is 20 workday(s)
from: 2015-02-01 to: 2015-02-28 is 20 workday(s)
from: 2015-02-02 to: 2015-02-22 is 15 workday(s)
from: 2015-02-02 to: 2015-02-23 is 16 workday(s)
from: 2015-02-02 to: 2015-02-24 is 17 workday(s)
from: 2015-02-02 to: 2015-02-25 is 18 workday(s)
from: 2015-02-02 to: 2015-02-26 is 19 workday(s)
from: 2015-02-02 to: 2015-02-27 is 20 workday(s)
from: 2015-02-02 to: 2015-02-28 is 20 workday(s)
from: 2015-02-03 to: 2015-02-22 is 14 workday(s)
from: 2015-02-03 to: 2015-02-23 is 15 workday(s)
from: 2015-02-03 to: 2015-02-24 is 16 workday(s)
from: 2015-02-03 to: 2015-02-25 is 17 workday(s)
from: 2015-02-03 to: 2015-02-26 is 18 workday(s)
from: 2015-02-03 to: 2015-02-27 is 19 workday(s)
from: 2015-02-03 to: 2015-02-28 is 19 workday(s)
from: 2015-02-04 to: 2015-02-22 is 13 workday(s)
from: 2015-02-04 to: 2015-02-23 is 14 workday(s)
from: 2015-02-04 to: 2015-02-24 is 15 workday(s)
from: 2015-02-04 to: 2015-02-25 is 16 workday(s)
from: 2015-02-04 to: 2015-02-26 is 17 workday(s)
from: 2015-02-04 to: 2015-02-27 is 18 workday(s)
from: 2015-02-04 to: 2015-02-28 is 18 workday(s)
from: 2015-02-05 to: 2015-02-22 is 12 workday(s)
from: 2015-02-05 to: 2015-02-23 is 13 workday(s)
from: 2015-02-05 to: 2015-02-24 is 14 workday(s)
from: 2015-02-05 to: 2015-02-25 is 15 workday(s)
from: 2015-02-05 to: 2015-02-26 is 16 workday(s)
from: 2015-02-05 to: 2015-02-27 is 17 workday(s)
from: 2015-02-05 to: 2015-02-28 is 17 workday(s)
from: 2015-02-06 to: 2015-02-22 is 11 workday(s)
from: 2015-02-06 to: 2015-02-23 is 12 workday(s)
from: 2015-02-06 to: 2015-02-24 is 13 workday(s)
from: 2015-02-06 to: 2015-02-25 is 14 workday(s)
from: 2015-02-06 to: 2015-02-26 is 15 workday(s)
from: 2015-02-06 to: 2015-02-27 is 16 workday(s)
from: 2015-02-06 to: 2015-02-28 is 16 workday(s)
from: 2015-02-07 to: 2015-02-22 is 10 workday(s)
from: 2015-02-07 to: 2015-02-23 is 11 workday(s)
from: 2015-02-07 to: 2015-02-24 is 12 workday(s)
from: 2015-02-07 to: 2015-02-25 is 13 workday(s)
from: 2015-02-07 to: 2015-02-26 is 14 workday(s)
from: 2015-02-07 to: 2015-02-27 is 15 workday(s)
from: 2015-02-07 to: 2015-02-28 is 15 workday(s)

【讨论】：

对于 5 天的日期范围，它给出 5.7 天。
其实对于小于 7 天的日期范围，该值是十进制数字。
我遇到了同样的问题。这是由于一周开始和结束之间的夏令时差异。修复如下。
只需添加Math.floor(days) 即可解决问题'__'）感谢您发现这一点

【解决方案2】：

如果日子在同一周（例如从太阳到星期六），我发现 kokizzu 的答案不起作用，所以改为解决这个问题：

    function calcBusinessDays(startDate, endDate) { 
      var day = moment(startDate);
      var businessDays = 0;

      while (day.isSameOrBefore(endDate,'day')) {
        if (day.day()!=0 && day.day()!=6) businessDays++;
        day.add(1,'d');
      }
      return businessDays;
    }

【讨论】：

对我来说可以在多个月内正常工作...也许您可以分享您的代码/错误？

【解决方案3】：

我已对 Kokizzu 的回答进行了改编，以解决夏令时问题。在巴西时区 (GMT -3) 中，17/10/2017 和 18/10/2017 之间的差异是 -2.71 而不是 2。

本周开始时间是 15/10/2017 00:00 UTC 或 14/10/2017 21:00-03:00

本周结束时间为 22/10/2017 00:00 UTC 或 21/10/2017 22:00-02:00（夏令时）

因此，“first”和“last”变量之间的天数之差不是 7，而是 6（或 8，具体取决于您的时区）。

修复的代码如下：

start = moment(start).utc().add(start.utcOffset(), 'm'); // Ignore timezones
end = moment(end).utc().add(end.utcOffset(), 'm'); // Ignore timezones

var first = start.clone().endOf('week'); // end of first week
var last = end.clone().startOf('week'); // start of last week

// Fixing Summer Time problems
firstCorrection = moment(first).utc().add(60, 'm').toDate(); //
var days = last.diff(firstCorrection,'days') * 5 / 7; // this will always multiply of 7

var wfirst = first.day() - start.day(); // check first week
if(start.day() == 0) --wfirst; // -1 if start with sunday
var wlast = end.day() - last.day(); // check last week
if(end.day() == 6) --wlast; // -1 if end with saturday
return wfirst + days + wlast; // get the total (subtract holidays if needed)

【讨论】：

【解决方案4】：

我使用一个简单的函数来实现这一点。也许不是最有效的，但它确实有效。它不需要 Moment.js。它只是 Javascript。

function getNumWorkDays(startDate, endDate) {
    var numWorkDays = 0;
    var currentDate = new Date(startDate);
    while (currentDate <= endDate) {
        // Skips Sunday and Saturday
        if (currentDate.getDay() !== 0 && currentDate.getDay() !== 6) {
            numWorkDays++;
        }
        currentDate = currentDate.addDays(1);
    }
    return numWorkDays;
}

致addDays，我使用如下函数：

Date.prototype.addDays = function (days) {
    var date = new Date(this.valueOf());
    date.setDate(date.getDate() + days);
    return date;
};

【讨论】：

【解决方案5】：

你可以试试这个（没有循环）：

  function getBusinessDays(endDate, startDate) {
    var lastDay = moment(endDate);
    var firstDay = moment(startDate);
    let calcBusinessDays = 1 + (lastDay.diff(firstDay, 'days') * 5 -
      (firstDay.day() - lastDay.day()) * 2) / 7;

    if (lastDay.day() == 6) calcBusinessDays--;//SAT
    if (firstDay.day() == 0) calcBusinessDays--;//SUN

    return calcBusinessDays;
  }

Original Source

【讨论】：

【解决方案6】：

通过使用momentjs，可以这样：

private calculateWorkdays(startDate: Date, endDate: Date): number {
// + 1 cause diff returns the difference between two moments, in this case the day itself should be included.

const totalDays: number = moment(endDate).diff(moment(startDate), 'days') + 1;
const dayOfWeek = moment(startDate).isoWeekday();
let totalWorkdays = 0;

for (let i = dayOfWeek; i < totalDays + dayOfWeek; i++) {
    if (i % 7 !== 6 && i % 7 !== 0) {
      totalWorkdays++;
    }
  }
  return totalWorkdays;
}

【讨论】：

欢迎来到 SO！ stackoverflow.com 上只允许使用英语回答。欲了解更多信息，请阅读this post

【解决方案7】：

我已经使用了一个有用的库 moment-business-days 加上 moment

NPM Link of Moment-business-days

NPM Link of Moment

之间的工作日示例

const diff = moment('05-15-2017', 'MM-DD-YYYY').businessDiff(moment('05-08-2017','MM-DD-YYYY'));
// diff = 5

【讨论】：