blocks|key|373098|text|在创建日期对象时遇到问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|373099|使用Date()构造函数创建Date对象。|373100|实例化日期的方法有四种：|373101|new+Date()+//+current+date+and+time
new+Date(milliseconds)+//milliseconds+since+1970/01/01
new+Date(dateString)
new+Date(year,+month,+day,+hours,+minutes,+seconds,+milliseconds)|code-block|syntax|javascript|373102|以上大多数参数都是可选的。如果不指定，则会导致传入0。|373103|一旦创建了Date对象，就可以使用许多方法对其进行操作。大多数方法允许您使用本地时间或UTC+(通用或GMT)时间获取和设置对象的年、月、日、小时、分钟、秒和毫秒。|373104|所有日期以毫秒为单位计算，从1970年1月1日00:00:00世界时间(UTC)开始，一天包含86,400,000毫秒。|373105|实例化日期的一些示例：|373106|var+today+=+new+Date()
var+d1+=+new+Date("October+13,+1975+11:13:00")
var+d2+=+new+Date(79,5,24)
var+d3+=+new+Date(79,5,24,11,33,0)|373107|(取自date.asp)|offset|length|373108|entityMap|0|LINK|mutability|MUTABLE|url|http://www.w3schools.com/js/js_obj_date.asp^0|0|0|0|0|0|0|0|0|0|3|8|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|17|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|18|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|19|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|1A|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1B|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1D|8|@]|9|@]|A|$]]|$1|S|3|T|5|H|7|1E|8|@]|9|@]|A|$I|J]]|$1|U|3|V|5|6|7|1F|8|@]|9|@$W|1G|X|1H|1|1I]]|A|$]]|$1|Y|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]]|Z|$10|$5|11|12|13|A|$14|15]]]]

You have problem in creating the Date Object

Date objects are created with the Date() constructor.

There are four ways of instantiating a date:

<pre><code>new Date() // current date and time
new Date(milliseconds) //milliseconds since 1970/01/01
new Date(dateString)
new Date(year, month, day, hours, minutes, seconds, milliseconds)
</code></pre>

Most parameters above are optional. Not specifying, causes 0 to be passed in.

Once a Date object is created, a number of methods allow you to operate on it. Most methods allow you to get and set the year, month, day, hour, minute, second, and milliseconds of the object, using either local time or UTC (universal, or GMT) time.

All dates are calculated in milliseconds from 01 January, 1970 00:00:00 Universal Time (UTC) with a day containing 86,400,000 milliseconds.

Some examples of instantiating a date:

<pre><code>var today = new Date()
var d1 = new Date("October 13, 1975 11:13:00")
var d2 = new Date(79,5,24)
var d3 = new Date(79,5,24,11,33,0)
</code></pre>

(Taken from <a href="http://www.w3schools.com/js/js_obj_date.asp" rel="nofollow">http://www.w3schools.com/js/js_obj_date.asp</a>)

blocks|key|372346|text|IE不支持Date.parse或将"2012-02-09"+(带有ISO日期)传递给new+Date，您需要自己解析它并传递new+Date(+2012,+1,+9+)或使用shim+for+ISO日期|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|372347|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/kriskowal/es5-shim^0|5|A|H|C|16|8|1Q|M|2F|E|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@$9|W|A|X|1|Y]]|E|$]]|$1|F|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

IE doesn't support <code>Date.parse</code> or passing <code>"2012-02-09"</code> (with ISO dates) to <code>new Date</code>, you need to parse it yourself and pass <code>new Date( 2012, 1, 9 )</code> or use a <a href="https://github.com/kriskowal/es5-shim" rel="nofollow"><code>Date.parse</code> shim for ISO dates</a>

blocks|key|281747|text|Date不支持您传递的日期格式(Yyyy)。请参见说明这里，其中指出它必须采用parse可解析的格式。有关可接受的解析格式，请参见此处：对象/日期/解析|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|281748|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date|1|https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date/parse^0|0|4|13|5|R|2|0|1W|8|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]|$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]|N|$5|I|J|K|E|$L|O]]]]

The date format you're passing (yyyy-mm-dd) isn't supported by <code>Date</code>. See the note <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date" rel="nofollow">here</a> that says it must be in a format parsable by <code>parse</code>. See here for acceptable parse formats: <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date/parse" rel="nofollow">https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date/parse</a>

blocks|key|373166|text|您正在以不正确的格式提供日期参数。您可以期望javascript支持以下格式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|373167|MM-dd-yyyy
yyyy/MM/dd
MM/dd/yyyy
MMMM+dd,+yyyy
MMM+dd,+yyyy|code-block|syntax|javascript|373168|要解决眼前的问题，可以使用replace()来格式化参数。|offset|length|style|CODE|373169|function+days_between(check_in,+check_out)
{
++++var+firstDate+=+new+Date(check_in.replace('-'+,+'/'));
++++var+secondDate+=+new+Date(check_out.replace('-'+,+'/'));++++
++++var+diffDays+=+Math.abs((firstDate.getTime()+-+secondDate.getTime())+/+86400000);
++++return+diffDays;
}|373170|顺便说一句，您可以用常量替换oneDay。|373171|entityMap^0|0|0|D|9|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@$I|V|J|W|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

You are giving the date arguments in an incorrect format. You can expect javascript to support these formats:

<pre><code>MM-dd-yyyy
yyyy/MM/dd
MM/dd/yyyy
MMMM dd, yyyy
MMM dd, yyyy
</code></pre>

To fix your immediate problem, you can use <code>replace()</code> to format your arguments.

<pre><code>function days_between(check_in, check_out)
{
 var firstDate = new Date(check_in.replace('-' , '/'));
 var secondDate = new Date(check_out.replace('-' , '/')); 
 var diffDays = Math.abs((firstDate.getTime() - secondDate.getTime()) / 86400000);
 return diffDays;
}
</code></pre>

And by the way, you can replace oneDay with a constant.

Any idea why this function doesn't work properly in Internet Explorer?

<pre><code>function days_between(check_in, check_out)
{
 var oneDay = 24*60*60*1000; 
 var firstDate = new Date(check_in);
 var secondDate = new Date(check_out); 
 var diffDays = Math.abs((firstDate.getTime() - secondDate.getTime())/(oneDay));
 return diffDays;
}
</code></pre>

in internet explorer it shows NaN as result.

im calling this function in this date format

<pre><code>var check_in = "2012-02-09";
var check_out = "2012-02-12"; 
var range = days_between(check_in, check_out);
</code></pre>

Regards

What is wrong with this javascript date difference calculate function?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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知道为什么此功能在中不能正常工作吗？function days_between(check_in, check_out){    var oneDay = 24*60*60*1000;     var firstDate = new Date(check_in);    var secondDate = new Dat...

问这个javascript日期差计算函数有什么问题？
EN

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问这个javascript日期差计算函数有什么问题？EN