如何计算两个日期之间的天数

I have two input dates taking from Date Picker control. I have selected start date 2/2/2012 and end date 2/7/2012. I have written following code for that.

我有两个输入日期来自日期选择器控件。我选择了开始日期2/2/2012和结束日期2/7/2012。我已经为此编写了以下代码。

I should get result as 6 but I am getting 5.

我应该得到结果6但我得到5。

function SetDays(invoker) {   
    var start = $find('<%=StartWebDatePicker.ClientID%>').get_value();
    var end = $find('<%=EndWebDatePicker.ClientID%>').get_value();

    var oneDay=1000 * 60 * 60 * 24;
    var difference_ms = Math.abs(end.getTime() - start.getTime())
    var diffValue = Math.round(difference_ms / oneDay);
}

Can anyone tell me how I can get exact difference?

谁能告诉我如何才能得到确切的区别？

5 个解决方案

#1

342

http://momentjs.com/ or https://date-fns.org/

http://momentjs.com/或https://date-fns.org/

From Moment docs:

来自Moment docs：

var a = moment([2007, 0, 29]);
var b = moment([2007, 0, 28]);
a.diff(b, 'days')   // =1

or to include the start:

或者包括开头：

a.diff(b, 'days')+1   // =2

Beats messing with timestamps and time zones manually.

节拍手动弄乱时间戳和时区。

Depending on your specific use case, you can either

根据您的具体用例，您也可以

Use a/b.startOf('day') and/or a/b.endOf('day') to force the diff to be inclusive or exclusive at the "ends" (as suggested by @kotpal in the comments).
使用/ b.startOf（'day'）和/或a / b.endOf（'day'）强制diff在“ends”处包含或排除（如注释中的@kotpal所示）。
Set third argument true to get a floating point diff which you can then Math.floor, Math.ceil or Math.round as needed.
将第三个参数设置为true以获得浮点diff，然后根据需要可以使用Math.floor，Math.ceil或Math.round。
Option 2 can also be accomplished by getting 'seconds' instead of 'days' and then dividing by 24*60*60.
选项2也可以通过获得'秒'代替'天'然后除以24 * 60 * 60来实现。

#2

Try:

尝试：

//Difference in days

var diff =  Math.floor(( start - end ) / 86400000);
alert(diff);

#3

If you are using moment.js you can do it easily.

如果您使用moment.js，您可以轻松完成。

var start = moment("2018-03-10", "YYYY-MM-DD");
var end = moment("2018-03-15", "YYYY-MM-DD");

//Difference in number of days
moment.duration(start.diff(end)).asDays();

//Difference in number of weeks
moment.duration(start.diff(end)).asWeeks();

If you want to find difference between a given date and current date in number of days (ignoring time), make sure to remove time from moment object of current date as below

如果您想在天数（忽略时间）内找到给定日期和当前日期之间的差异，请确保从当前日期的当前对象中删除时间，如下所示

moment().startOf('day')

To find difference between a given date and current date in number of days

查找给定日期和当前日期之间的天数差异

var given = moment("2018-03-10", "YYYY-MM-DD");
var current = moment().startOf('day');

//Difference in number of days
moment.duration(given.diff(current)).asDays();

#4

Try this Using moment.js (Its quite easy to compute date operations in javascript)

试试这个使用moment.js（在javascript中很容易计算日期操作）

firstDate.diff(secondDate, 'days', false);// true|false for fraction value

firstDate.diff（secondDate，'days'，false）; // true | false表示分数值

Result will give you number of days in integer.

结果将给出整数天数。

#5

Also you can use this code: moment("yourDateHere", "YYYY-MM-DD").fromNow(). This will calculate the difference between today and your provided date.

你也可以使用这段代码：moment（“yourDateHere”，“YYYY-MM-DD”）。fromNow（）。这将计算今天和您提供的日期之间的差异。

#1

342