如何在 JavaScript 中获取日期时间？
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How to get datetime in JavaScript?
提问by nimi
How to get date time in JavaScript with format 31/12/2010 03:55 AM?
如何在 JavaScript 中获取格式为 31/12/2010 03:55 AM 的日期时间？
回答by Andrew Mao
回答by Shadow Wizard is Ear For You
If the format is "fixed" meaning you don't have to use other format you can have pure JavaScript instead of using whole library to format the date:
如果格式是“固定的”，这意味着您不必使用其他格式，您可以使用纯 JavaScript 而不是使用整个库来格式化日期：
//Pad given value to the left with "0"
function AddZero(num) {
return (num >= 0 && num < 10) ? "0" + num : num + "";
}
window.onload = function() {
var now = new Date();
var strDateTime = [[AddZero(now.getDate()),
AddZero(now.getMonth() + 1),
now.getFullYear()].join("/"),
[AddZero(now.getHours()),
AddZero(now.getMinutes())].join(":"),
now.getHours() >= 12 ? "PM" : "AM"].join(" ");
document.getElementById("Console").innerHTML = "Now: " + strDateTime;
};<div id="Console"></div>The variable strDateTimewill hold the date/time in the format you desire and you should be able to tweak it pretty easily if you need.
该变量strDateTime将以您想要的格式保存日期/时间，如果需要，您应该能够轻松调整它。
I'm using joinas good practice, nothing more, it's better than adding strings together.
我正在使用join作为良好实践，仅此而已，这比将字符串添加在一起更好。
回答by ArK
var now = new Date();
now.format("dd/MM/yyyy hh:mm TT");
Get full details here: Flagrant Badassery ? JavaScript Date Format
在此处获取完整详细信息：Flagrant Badassery ？JavaScript 日期格式
回答by user1274820
Date().toLocaleString()returns this: 7/31/2018, 12:58:03 PM
Date().toLocaleString()返回这个： 7/31/2018, 12:58:03 PM
Pretty close - just drop the comma and the seconds:
非常接近 - 只需删除逗号和秒：
new Date().toLocaleString().replace(",","").replace(/:.. /," ");
new Date().toLocaleString().replace(",","").replace(/:.. /," ");
Results: 7/31/2018 12:58 PM
结果： 7/31/2018 12:58 PM
回答by Opty
function pad_2(number)
{
return (number < 10 ? '0' : '') + number;
}
function hours(date)
{
var hours = date.getHours();
if(hours > 12)
return hours - 12; // Substract 12 hours when 13:00 and more
return hours;
}
function am_pm(date)
{
if(date.getHours()==0 && date.getMinutes()==0 && date.getSeconds()==0)
return ''; // No AM for MidNight
if(date.getHours()==12 && date.getMinutes()==0 && date.getSeconds()==0)
return ''; // No PM for Noon
if(date.getHours()<12)
return ' AM';
return ' PM';
}
function date_format(date)
{
return pad_2(date.getDate()) + '/' +
pad_2(date.getMonth()+1) + '/' +
(date.getFullYear() + ' ').substring(2) +
pad_2(hours(date)) + ':' +
pad_2(date.getMinutes()) +
am_pm(date);
}
Code corrected as of Sep 3 '12 at 10:11
代码更正截至 2012 年 9 月 3 日 10:11
回答by Harpreet Singh
You can convert Date to almost any format using the SnippetI have added below.
您可以使用我在下面添加的代码段将日期转换为几乎任何格式。
Code:
代码：
dateFormat(new Date(),"dd/mm/yy h:MM TT")
//"20/06/14 6:49 PM"
Other examples
其他例子
// Can also be used as a standalone function
dateFormat(new Date(), "dddd, mmmm dS, yyyy, h:MM:ss TT");
// Saturday, June 9th, 2007, 5:46:21 PM
dateFormat(new Date(),"dddd d mmmm yyyy")
//Monday 2 June 2014"
Snippet:
片段：
Add following code taken from this linkinto your code.
将从此链接中获取的以下代码添加到您的代码中。
var dateFormat = function () {
var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])?|[LloSZ]|"[^"]*"|'[^']*'/g,
timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
timezoneClip = /[^-+\dA-Z]/g,
pad = function (val, len) {
val = String(val);
len = len || 2;
while (val.length < len) val = "0" + val;
return val;
};
// Regexes and supporting functions are cached through closure
return function (date, mask, utc) {
var dF = dateFormat;
// You can't provide utc if you skip other args (use the "UTC:" mask prefix)
if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) {
mask = date;
date = undefined;
}
// Passing date through Date applies Date.parse, if necessary
date = date ? new Date(date) : new Date;
if (isNaN(date)) throw SyntaxError("invalid date");
mask = String(dF.masks[mask] || mask || dF.masks["default"]);
// Allow setting the utc argument via the mask
if (mask.slice(0, 4) == "UTC:") {
mask = mask.slice(4);
utc = true;
}
var _ = utc ? "getUTC" : "get",
d = date[_ + "Date"](),
D = date[_ + "Day"](),
m = date[_ + "Month"](),
y = date[_ + "FullYear"](),
H = date[_ + "Hours"](),
M = date[_ + "Minutes"](),
s = date[_ + "Seconds"](),
L = date[_ + "Milliseconds"](),
o = utc ? 0 : date.getTimezoneOffset(),
flags = {
d: d,
dd: pad(d),
ddd: dF.i18n.dayNames[D],
dddd: dF.i18n.dayNames[D + 7],
m: m + 1,
mm: pad(m + 1),
mmm: dF.i18n.monthNames[m],
mmmm: dF.i18n.monthNames[m + 12],
yy: String(y).slice(2),
yyyy: y,
h: H % 12 || 12,
hh: pad(H % 12 || 12),
H: H,
HH: pad(H),
M: M,
MM: pad(M),
s: s,
ss: pad(s),
l: pad(L, 3),
L: pad(L > 99 ? Math.round(L / 10) : L),
t: H < 12 ? "a" : "p",
tt: H < 12 ? "am" : "pm",
T: H < 12 ? "A" : "P",
TT: H < 12 ? "AM" : "PM",
Z: utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
o: (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
S: ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]
};
return mask.replace(token, function (function getNowDateTimeStr(){
var now = new Date();
var hour = now.getHours() - (now.getHours() >= 12 ? 12 : 0);
return [[AddZero(now.getDate()), AddZero(now.getMonth() + 1), now.getFullYear()].join("/"), [AddZero(hour), AddZero(now.getMinutes())].join(":"), now.getHours() >= 12 ? "PM" : "AM"].join(" ");
}
//Pad given value to the left with "0"
function AddZero(num) {
return (num >= 0 && num < 10) ? "0" + num : num + "";
}
) {
return ##代码## in flags ? flags[##代码##] : ##代码##.slice(1, ##代码##.length - 1);
});
};
}();
// Some common format strings
dateFormat.masks = {
"default": "ddd mmm dd yyyy HH:MM:ss",
shortDate: "m/d/yy",
mediumDate: "mmm d, yyyy",
longDate: "mmmm d, yyyy",
fullDate: "dddd, mmmm d, yyyy",
shortTime: "h:MM TT",
mediumTime: "h:MM:ss TT",
longTime: "h:MM:ss TT Z",
isoDate: "yyyy-mm-dd",
isoTime: "HH:MM:ss",
isoDateTime: "yyyy-mm-dd'T'HH:MM:ss",
isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};
// Internationalization strings
dateFormat.i18n = {
dayNames: [
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
],
monthNames: [
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
]
};
// For convenience...
Date.prototype.format = function (mask, utc) {
return dateFormat(this, mask, utc);
};
回答by dalmate
@Shadow Wizard's code should return 02:45 PM instead of 14:45 PM. So I modified his code a bit:
@Shadow Wizard 的代码应该返回 02:45 PM 而不是 14:45 PM。所以我稍微修改了他的代码：
##代码##