Javascript 如何检查输入日期是否等于今天的日期？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/8215556/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to check if input date is equal to today's date?
提问by JonoB
I have a form input with an id of 'date_trans'. The format for that date input (which is validated server side) can be any of:
我有一个 ID 为“date_trans”的表单输入。该日期输入的格式（经过验证的服务器端）可以是以下任何一种：
- dd/mm/yyyy
- dd-mm-yyyy
- yyyy-mm-dd
- yyyy/mm/dd
- 日/月/年
- dd-mm-yyyy
- yyyy-mm-dd
- 年/月/日
However, before posting the form, I'd like to check if the date_trans field has a date that is equal to today's date. Its ok if the date taken is the client's date (i.e. it uses js), since I run a double check on the server as well.
但是，在发布表单之前，我想检查 date_trans 字段的日期是否等于今天的日期。如果所采用的日期是客户端的日期（即它使用 js），则可以，因为我也在服务器上进行了双重检查。
I'm totally lost on how to do the date comparrison in jQuery or just plain old javascript. If it helps, I am using the jquery datepicker
我完全不知道如何在 jQuery 或只是简单的旧 javascript 中进行日期比较。如果有帮助，我正在使用jquery datepicker
回答by James Hill
A simple date comparison in pure JS should be sufficient:
纯 JS 中的简单日期比较应该就足够了：
// Create date from input value
var inputDate = new Date("11/21/2011");
// Get today's date
var todaysDate = new Date();
// call setHours to take the time out of the comparison
if(inputDate.setHours(0,0,0,0) == todaysDate.setHours(0,0,0,0)) {
// Date equals today's date
}
Here's a working JSFiddle.
回答by schellmax
for completeness, taken from this solution:
为了完整性，取自此解决方案：
You could use toDateString:
您可以使用 toDateString：
var today = new Date();
var isToday = (today.toDateString() == otherDate.toDateString());
no library dependencies, and looking cleaner than the 'setHours()' approach shown in a previous answer, imho
没有库依赖关系，看起来比上一个答案中显示的“setHours()”方法更干净，恕我直言
回答by Cengkaruk
Try using moment.js
尝试使用 moment.js
moment('dd/mm/yyyy').isSame(Date.now(), 'day');
You can replace 'day' string with 'year, month, minute' if you want.
如果需要，您可以将 'day' 字符串替换为 'year、month、minute'。
回答by Phrogz
function sameDay( d1, d2 ){
return d1.getUTCFullYear() == d2.getUTCFullYear() &&
d1.getUTCMonth() == d2.getUTCMonth() &&
d1.getUTCDate() == d2.getUTCDate();
}
if (sameDay( new Date(userString), new Date)){
// ...
}
Using the UTC* methods ensures that two equivalent days in different timezones matching the same global day are the same. (Not necessary if you're parsing both dates directly, but a good thing to think about.)
使用 UTC* 方法可确保与同一全球日匹配的不同时区中的两个等效日相同。（如果您直接解析两个日期，则没有必要，但值得考虑。）
回答by Ravi Kant
Just use the following code in your javaScript:
只需在您的 javaScript 中使用以下代码：
if(new Date(hireDate).getTime() > new Date().getTime())
{
//Date greater than today's date
}
Change the condition according to your requirement.Here is one link for comparision compare in java script
回答by L-Ray
The following solution compares the timestamp integer divided by the values of hours, minutes, seconds, millis.
以下解决方案比较时间戳整数除以小时、分钟、秒、毫秒的值。
var reducedToDay = function(date){return ~~(date.getTime()/(1000*60*60*24));};
return reducedToDay(date1) == reducedToDay(date2)
The tilde truncs the division result (see this article about integer division)
波浪号截断除法结果（请参阅有关整数除法的文章）
回答by Diodeus - James MacFarlane
回答by Adwich
There is a simpler solution
有一个更简单的解决方案
if (inputDate.getDate() === todayDate.getDate()) {
// do stuff
}
like that you don't loose the time attached to inputDateif any
这样你就不会失去附加的时间（inputDate如果有的话）
回答by Ronk
TodayDate = new Date();
if (TodayDate > AnotherDate) {} else{}
< = also works, Although with =, it might have to match the milliseconds.
< = 也有效，虽然使用 =，但它可能必须匹配毫秒。
