Date对象格式化函数代码
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代码如下:
/*
* Date Format 1.2.3
* (c) 2007-2009 Steven Levithan
* MIT license
*
* Includes enhancements by Scott Trenda
* and Kris Kowal
*
* Accepts a date, a mask, or a date and a mask.
* Returns a formatted version of the given date.
* The date defaults to the current date/time.
* The mask defaults to dateFormat.masks.default.
*/
var dateFormat = function () {
var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[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 ($0) {
return $0 in flags ? flags[$0] : $0.slice(1, $0.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);
};
用法：
代码如下:
var now = new Date();
now.format("m/dd/yy");
// Returns, e.g., 6/09/07
// Can also be used as a standalone function
dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT");
// Saturday, June 9th, 2007, 5:46:21 PM
// You can use one of several named masks
now.format("isoDateTime");
// 2007-06-09T17:46:21
// ...Or add your own
dateFormat.masks.hammerTime = 'HH:MM! "Can\'t touch this!"';
now.format("hammerTime");
// 17:46! Can't touch this!
// When using the standalone dateFormat function,
// you can also provide the date as a string
dateFormat("Jun 9 2007", "fullDate");
// Saturday, June 9, 2007
// Note that if you don't include the mask argument,
// dateFormat.masks.default is used
now.format();
// Sat Jun 09 2007 17:46:21
// And if you don't include the date argument,
// the current date and time is used
dateFormat();
// Sat Jun 09 2007 17:46:22
// You can also skip the date argument (as long as your mask doesn't
// contain any numbers), in which case the current date/time is used
dateFormat("longTime");
// 5:46:22 PM EST
// And finally, you can convert local time to UTC time. Either pass in
// true as an additional argument (no argument skipping allowed in this case):
dateFormat(now, "longTime", true);
now.format("longTime", true);
// Both lines return, e.g., 10:46:21 PM UTC
// ...Or add the prefix "UTC:" to your mask.
now.format("UTC:h:MM:ss TT Z");
// 10:46:21 PM UTC
| Mask | Description |
|---|---|
d |
Day of the month as digits; no leading zero for single-digit days. |
dd |
Day of the month as digits; leading zero for single-digit days. |
ddd |
Day of the week as a three-letter abbreviation. |
dddd |
Day of the week as its full name. |
m |
Month as digits; no leading zero for single-digit months. |
mm |
Month as digits; leading zero for single-digit months. |
mmm |
Month as a three-letter abbreviation. |
mmmm |
Month as its full name. |
yy |
Year as last two digits; leading zero for years less than 10. |
yyyy |
Year represented by four digits. |
h |
Hours; no leading zero for single-digit hours (12-hour clock). |
hh |
Hours; leading zero for single-digit hours (12-hour clock). |
H |
Hours; no leading zero for single-digit hours (24-hour clock). |
HH |
Hours; leading zero for single-digit hours (24-hour clock). |
M |
Minutes; no leading zero for single-digit minutes. Uppercase M unlike CF timeFormat's m to avoid conflict with months. |
MM |
Minutes; leading zero for single-digit minutes. Uppercase MM unlike CF timeFormat's mm to avoid conflict with months. |
s |
Seconds; no leading zero for single-digit seconds. |
ss |
Seconds; leading zero for single-digit seconds. |
l or L |
Milliseconds. l gives 3 digits. L gives 2 digits. |
t |
Lowercase, single-character time marker string: a or p. No equivalent in CF. |
tt |
Lowercase, two-character time marker string: am or pm. No equivalent in CF. |
T |
Uppercase, single-character time marker string: A or P. Uppercase T unlike CF's t to allow for user-specified casing. |
TT |
Uppercase, two-character time marker string: AM or PM. Uppercase TT unlike CF's tt to allow for user-specified casing. |
Z |
US timezone abbreviation, e.g. EST or MDT. With non-US timezones or in the Opera browser, the GMT/UTC offset is returned, e.g. GMT-0500 No equivalent in CF. |
o |
GMT/UTC timezone offset, e.g. -0500 or +0230. No equivalent in CF. |
S |
The date's ordinal suffix (st, nd, rd, or th). Works well with d.No equivalent in CF. |
'…' or "…" |
Literal character sequence. Surrounding quotes are removed. No equivalent in CF. |
UTC: |
Must be the first four characters of the mask. Converts the date from local time to UTC/GMT/Zulu time before applying the mask. The “UTC:” prefix is removed. No equivalent in CF. |
| Name | Mask | Example |
|---|---|---|
| default | ddd mmm dd yyyy HH:MM:ss | Sat Jun 09 2007 17:46:21 |
| shortDate | m/d/yy | 6/9/07 |
| mediumDate | mmm d, yyyy | Jun 9, 2007 |
| longDate | mmmm d, yyyy | June 9, 2007 |
| fullDate | dddd, mmmm d, yyyy | Saturday, June 9, 2007 |
| shortTime | h:MM TT | 5:46 PM |
| mediumTime | h:MM:ss TT | 5:46:21 PM |
| longTime | h:MM:ss TT Z | 5:46:21 PM EST |
| isoDate | yyyy-mm-dd | 2007-06-09 |
| isoTime | HH:MM:ss | 17:46:21 |
| isoDateTime | yyyy-mm-dd'T'HH:MM:ss | 2007-06-09T17:46:21 |
| isoUtcDateTime | UTC:yyyy-mm-dd'T'HH:MM:ss'Z' | 2007-06-09T22:46:21Z |
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