Javascript 如何在javascript中将完整日期转换为短日期？
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How to convert a full date to a short date in javascript?
提问by chobo2
I have a date like this Monday, January 9, 2010
我有一个这样的约会，2010 年 1 月 9 日星期一
I now want to convert it to
我现在想将其转换为
1/9/2010 mm/dd/yyyy
1/9/2010 毫米/日/年
I tried to do this
我试图这样做
var startDate = "Monday, January 9, 2010";
var convertedStartDate = new Date(startDate);
var month = convertedStartDate.getMonth() + 1
var day = convertedStartDate.getDay();
var year = convertedStartDate.getFullYear();
var shortStartDate = month + "/" + day + "/" + year;
However it must be thinking the date is in a different format since day returns 1 instead of 9.
但是，它必须认为日期采用不同的格式，因为 day 返回 1 而不是 9。
回答by Roland Bouman
The getDay()method returns a number to indicate the day in week (0=Sun, 1=Mon, ... 6=Sat). Use getDate()to return a number for the day in month:
该getDay()方法返回一个数字来表示星期几（0=Sun，1=Mon，... 6=Sat）。使用getDate()返回某个数字的一天在一个月：
var day = convertedStartDate.getDate();
If you like, you can try to add a custom format function to the prototype of the Dateobject:
如果你喜欢，你可以尝试在Date对象的原型中添加自定义格式函数：
Date.prototype.formatMMDDYYYY = function(){
return (this.getMonth() + 1) +
"/" + this.getDate() +
"/" + this.getFullYear();
}
After doing this, you can call formatMMDDYYY()on anyinstance of the Dateobject. Of course, this is just a very specific example, and if you really need it, you can write a generic formatting function that would do this based on a formatting string, kinda like java's SimpleDateeFormat (http://java.sun.com/j2se/1.4.2/docs/api/java/text/SimpleDateFormat.html)
这样做后，你可以调用formatMMDDYYY()在任何的实例Date对象。当然，这只是一个非常具体的例子，如果你真的需要它，你可以编写一个通用的格式化函数，它会根据格式化字符串来做这件事，有点像 java 的 SimpleDateeFormat ( http://java.sun.com/ j2se/1.4.2/docs/api/java/text/SimpleDateFormat.html)
(tangent: the Dateobject always confuses me... getYear()vs getFullYear(), getDate()vs getDay(), getDate()ranges from 1..31, but getMonth()from 0..11
（切线：Date对象总是让我感到困惑...... getYear()vs getFullYear()，getDate()vs getDay()，getDate()范围从 1..31，但从getMonth()0..11
It's a mess, and I always need to take a peek. http://www.w3schools.com/jsref/jsref_obj_date.asp)
一团糟，我总是需要偷看一眼。http://www.w3schools.com/jsref/jsref_obj_date.asp)
回答by gnath
Here you go:
干得好：
(new Date()).toLocaleDateString('en-US');
That's it !!
就是这样 ！！
you can use it on any date object
您可以在任何日期对象上使用它
let's say.. you have an object called "currentDate"
比方说..你有一个名为“currentDate”的对象
var currentDate = new Date(); //use your date here
currentDate.toLocaleDateString('en-US'); // "en-US" gives date in US Format - mm/dd/yy
(or)
（或者）
If you want it in local format then
如果你想要本地格式，那么
currentDate.toLocaleDateString(); // gives date in local Format
回答by Constantin
Built-in toLocaleDateString()does the job, but it will remove the leading 0s for the day and month, so we will get something like "1/9/1970", which is not perfect in my opinion. To get a proper format MM/DD/YYYYwe can use something like:
内置可以toLocaleDateString()完成这项工作，但它会删除日期和月份的前导 0，所以我们会得到类似“1/9/1970”的东西，在我看来这并不完美。要获得正确的格式，MM/DD/YYYY我们可以使用以下内容：
new Date(dateString).toLocaleDateString('en-US', {
day: '2-digit',
month: '2-digit',
year: 'numeric',
})
回答by Abilash Raghu
var d = new Date("Wed Mar 25 2015 05:30:00 GMT+0530 (India Standard Time)");
document.getElementById("demo").innerHTML = d.toLocaleDateString();
回答by TrevorBrooks
date.toLocaleDateString('en-US')works great. Here's some more information on it: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toLocaleDateString
date.toLocaleDateString('en-US')效果很好。这里有一些关于它的更多信息：https: //developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toLocaleDateString
回答by Kodie Grantham
You could do this pretty easily with my date-shortcodepackage:
你可以用我的date-shortcode包很容易地做到这一点：
const dateShortcode = require('date-shortcode')
var startDate = 'Monday, January 9, 2010'
dateShortcode.parse('{M/D/YYYY}', startDate)
//=> '1/9/2010'
回答by a.boussema
I was able to do that with :
我能够做到这一点：
var dateTest = new Date("04/04/2013");
dateTest.toLocaleString().substring(0,dateTest.toLocaleString().indexOf(' '))
the 04/04/2013 is just for testing, replace with your Date Object.
04/04/2013 仅用于测试，请替换为您的日期对象。
回答by user838708
Try this:
尝试这个：
new Date().toLocaleFormat("%x");
