Javascript 如何获取 YYYY-MM-DD 格式的日期？
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How do I get a date in YYYY-MM-DD format?
提问by OneStig
Normally if I wanted to get the date I could just do something like
通常如果我想得到日期，我可以做一些类似的事情
var d = new Date();
console.log(d);
var d = new Date();
console.log(d);
The problem with doing that, is when I run that code, it returns:
这样做的问题是，当我运行该代码时，它返回：
Mon Aug 24 2015 4:20:00 GMT-0800 (Pacific Standard Time)
2015 年 8 月 24 日星期一 4:20:00 GMT-0800（太平洋标准时间）
How could I get the Date() method to return a value in a "MM-DD-YYYY" format so it would return something like:
我怎样才能让 Date() 方法以“MM-DD-YYYY”格式返回一个值，以便它返回如下内容：
8/24/2015
8/24/2015
Or, maybe MM-DD-YYYY H:M
或者，也许 MM-DD-YYYY H:M
8/24/2016 4:20
2016/8/24 4:20
回答by leaksterrr
Just use the built-in .toISOString()method like so: toISOString().split('T')[0]. Simple, clean and all in a single line.
只需使用内置的.toISOString()方法，像这样：toISOString().split('T')[0]。简单，干净，全部在一行中。
var date = (new Date()).toISOString().split('T')[0];
document.getElementById('date').innerHTML = date;<div id="date"></div>Please note that the timezone of the formatted string is UTCrather than local time.
请注意，格式化字符串的时区是UTC而不是本地时间。
回答by Patrick2607
The below code is a way of doing it. If you have a date, pass it to the convertDate()function and it will return a string in the YYYY-MM-DD format:
下面的代码是一种方法。如果你有一个日期，把它传递给convertDate()函数，它会返回一个 YYYY-MM-DD 格式的字符串：
var todaysDate = new Date();
function convertDate(date) {
var yyyy = date.getFullYear().toString();
var mm = (date.getMonth()+1).toString();
var dd = date.getDate().toString();
var mmChars = mm.split('');
var ddChars = dd.split('');
return yyyy + '-' + (mmChars[1]?mm:"0"+mmChars[0]) + '-' + (ddChars[1]?dd:"0"+ddChars[0]);
}
console.log(convertDate(todaysDate)); // Returns: 2015-08-25
回答by DevonDahon
Yet another way:
还有一种方式：
var today = new Date().getFullYear()+'-'+("0"+(new Date().getMonth()+1)).slice(-2)+'-'+("0"+new Date().getDate()).slice(-2)
document.getElementById("today").innerHTML = today<div id="today">回答by cezar
What you want to achieve can be accomplished with native JavaScript. The object Datehas methods that generate exactly the output you wish.
Here are code examples:
您想要实现的目标可以通过原生 JavaScript 实现。该对象Date具有生成您希望的输出的方法。
下面是代码示例：
var d = new Date();
console.log(d);
>>> Sun Jan 28 2018 08:28:04 GMT+0000 (GMT)
console.log(d.toLocaleDateString());
>>> 1/28/2018
console.log(d.toLocaleString());
>>> 1/28/2018, 8:28:04 AM
There is really no need to reinvent the wheel.
真的没有必要重新发明轮子。
回答by Omar Khaiyam
function formatdate(userDate){
var omar= new Date(userDate);
y = omar.getFullYear().toString();
m = omar.getMonth().toString();
d = omar.getDate().toString();
omar=y+m+d;
return omar;
}
console.log(formatDate("12/31/2014"));
回答by tylerwillis
If you're not opposed to adding a small library, Date-Mirror (NPMor unpkg) allows you to format an existing date in YYYY-MM-DD into whatever date string format you'd like.
如果您不反对添加小型库，Date-Mirror（NPM或unpkg）允许您将 YYYY-MM-DD 中的现有日期格式化为您喜欢的任何日期字符串格式。
date('n/j/Y', '2020-02-07') // 2/7/2020
date('n/j/Y g:iA', '2020-02-07 4:45PM') // 2/7/2020 4:45PM
date('n/j [until] n/j', '2020-02-07', '2020-02-08') // 2/7 until 2/8
Disclaimer: I developed Date-Mirror.
免责声明：我开发了 Date-Mirror。
回答by Lou Bagel
Here is a simple function I created when once I kept working on a project where I constantly needed to get today, yesterday, and tomorrow's date in this format.
这是我创建的一个简单函数，当我继续从事一个项目时，我经常需要以这种格式获取今天、昨天和明天的日期。
function returnYYYYMMDD(numFromToday = 0){
let d = new Date();
d.setDate(d.getDate() + numFromToday);
const month = d.getMonth() < 9 ? '0' + (d.getMonth() + 1) : d.getMonth() + 1;
const day = d.getDate() < 10 ? '0' + d.getDate() : d.getDate();
return `${d.getFullYear()}-${month}-${day}`;
}
console.log(returnYYYYMMDD(-1)); // returns yesterday
console.log(returnYYYYMMDD()); // returns today
console.log(returnYYYYMMDD(1)); // returns tomorrow
Can easily be modified to pass it a date instead, but here you pass a number and it will return that many days from today.
可以很容易地修改为传递一个日期，但在这里你传递一个数字，它会从今天起返回那么多天。
回答by usman tahir
By using moment.js library, you can do it:
通过使用 moment.js 库，您可以做到：
var datetime = new Date("2015-09-17 15:00:00"); datetime = moment(datetime).format("YYYY-MM-DD");
var datetime = new Date("2015-09-17 15:00:00"); datetime = moment(datetime).format("YYYY-MM-DD");
回答by user12094423
var today = new Date();
function formatDate(date) {
var dd = date.getDate();
var mm = date.getMonth() + 1; //January is 0!
var yyyy = date.getFullYear();
if (dd < 10) {
dd = '0' + dd;
}
if (mm < 10) {
mm = '0' + mm;
}
//return dd + '/' + mm + '/' + yyyy;
return yyyy + '/' + mm + '/' +dd ;
}
console.log(formatDate(today));
回答by Fisher
If you are trying to get the 'local-ISO' date string. Try the code below.
如果您尝试获取“local-ISO”日期字符串。试试下面的代码。
function (date) {
return new Date(+date - date.getTimezoneOffset() * 60 * 1000).toISOString().split(/[TZ]/).slice(0, 2).join(' ');
}
+dateGet milliseconds from a date.
+date从日期获取毫秒数。
Ref: Date.prototype.getTimezoneOffsetHave fun with it :)
参考：Date.prototype.getTimezoneOffset玩得开心:)
