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XDate是一个请谅解的JavaScript的原生Date对象的封装库,提供增强的功能解析,格式化和日期处理。使用起来就和JavaScript自己的对象和方法一样,非常简单。
XDate是一个请谅解的JavaScript的原生Date对象的封装库,提供增强的功能解析,格式化和日期处理。使用起来就和JavaScript自己的对象和方法一样,非常简单。
<script src="xdate.js"></script>
之后就可以了 new 一个日期出来,如
var d = new XDate("2012-9-9");
var c = new XDate(2012, 7, 8);
d.addDays(10);
var a = d.toString("yyyy/MM/dd");
Read more about date-string parsing
下面是xDate的常用方法:
getTime
.year
is a 4-digit yearmonth
is zero-indexed, meaning Jan=0, Feb=1, Mar=2, etc.Moves the xdate to the Monday of the given week with time 00:00:00. The week is represented by a given ISO week number and an optional year
. Ifyear
is omitted, the xdate‘s year with be used.
Setting preventOverflow
to true
prevents a date from "overflowing" into the next month. Example:
d=newXDate(2011,7,31);// August 31d.setMonth(8);// Septemberd.toString();// October 1st!!! because there are only 30 says in September// let‘s try this with preventOverflow...d=newXDate(2011,7,31);// August 31d.setMonth(8,true);// Septemberd.toString();// September 30!
Setting preventOverflow
to true
guarantees the date will be in desired month. It is optional and defaults to false
.
The following methods add or subtract time from the XDate:
If a value is negative, subtraction will occur. Values may be floating-point numbers.
Please note, these methods directly modify the object. Use clone if you need a copy.
The following methods return the amount of time that must be added to the XDate in order to arrive at otherDate
.
otherDate can be an XDate, a native Date, a milliseconds time, or a date-string.
The results will be positive or negative depending on the ordering of the dates:
varthanksgiving=newXDate(2011,10,24);varchristmas=newXDate(2011,11,25);thanksgiving.diffDays(christmas);// 31christmas.diffDays(thanksgiving);// -31
Also, the result can potentially be a floating-point number:
varjan2011=newXDate(2011,0,1);varjul2012=newXDate(2012,6,1);jan2011.diffYears(jul2012);// 1.5
You‘ll have to do the rounding or flooring yourself.
Date-strings must either be in ISO8601 format or IETF format (like "Mon Sep 05 2011 12:30:00 GMT-0700 (PDT)")
ISO8601 is the preferred format. Examples:
"2011-09-05"
"2011-09-05T12:30:00"
"2011-09-05T12:30:00-07:00"
"2011-09-05T12:30:00Z"
Advanced: extending the parser
formatString
is not specified, a browser-produced IETF string will be returned. settings
can be a name of an available locale or an object that overrides the default locale‘s settings.toString
but gets its values from the UTC version of the date. As a result, "Z" will be displayed as the timezone.A formatString
can contain any of the following tokens:
fff | milliseconds, 3-digits |
---|---|
s | seconds |
ss | seconds, 2-digits |
m | minutes |
mm | minutes, 2-digits |
h | hours, 12-hour clock |
hh | hours, 12-hour clock, 2-digits |
H | hours, 24-hour clock |
HH | hours, 24-hour clock, 2-digits |
d | date number |
dd | date number, 2-digits |
ddd | day name, 3-characters (like "Sun") |
dddd | day name, full (like "Sunday") |
M | month number (Jan=1, Feb=2, etc) |
MM | month number, 2-digits |
MMM | month name, 3-characters (like "Jan") |
MMMM | month name, full (like "January") |
yy | year, 2-digits |
yyyy | year, 4-digits |
t | a/p |
tt | am/pm |
T | A/P |
TT | AM/PM |
z | timezone offset hour (like "-7") or "Z" |
zz | timezone offset hour, 2-digits (like "-07") or "Z" |
zzz | timezone offset hour, 2-digits, and minutes (like "-07:00") or "Z" |
w | ISO week number |
ww | ISO week number, 2 digits |
S | day-of-week ordinal (like "st", "nd", "rd") |
i | ISO8601 format, without a timezone indicator |
u | ISO8601 format, with a timezone indicator |
Example:
vard=newXDate(2012,5,8);d.toString("MMM d, yyyy");// "Jun 8, 2012"d.toString("i");// "2012-06-08T00:00:00"d.toString("u");// "2012-06-08T00:00:00-07:00"
If you want to have literal text in your formatString, enclose it in single quotes:
vard=newXDate(2012,5,8);d.toString("‘the month is‘ MMMM");// "the month is June"
A literal single quote is represented by two consecutive single quotes.
If you want to output text only if certain values are non-zero, enclose your tokens in parenthesis:
newXDate(2011,0,1,6,0).toString(‘M/d/yy h(:mm)TT‘);// "1/1/11 6AM"newXDate(2011,0,1,6,30).toString(‘M/d/yy h(:mm)TT‘);// "1/1/11 6:30AM"
Advanced:
The following methods are similar to previously mentioned methods but operate on the UTC values of the date:
Just like a native Date, an XDate is represented by its number of milliseconds since the epoch. Also like a native Date, methods like getDate
and getHours
are dependant upon the client computer‘s timezone.
However, you can remove this reliance on the client computer‘s timezone and make a UTC date, a date without a timezone. A date in UTC-mode will have all of its "get" methods identical to its "getUTC" methods and won‘t experience any daylight-savings time.
A true
argument can be appended to any of the constructors to make an XDate in UTC-mode:
d=newXDate(true);// the current date, in UTC-moded.toString();// "Mon, 24 Oct 2011 08:42:08 GMT"d=newXDate(2012,5,8,true);// values will be interpreted as UTCd.toString();// "Fri, 08 Jun 2012 00:00:00 GMT"d=newXDate(‘2012-06-08‘,true);// ambiguous timezone, so will be parsed as UTCd.toString();// "Fri, 08 Jun 2012 00:00:00 GMT"
Here are methods that relate to UTC-mode:
true
if the date is in UTC-mode and false
otherwiseutcMode
must be either true
or false
. If the optional doCoercion
parameters is set to true
, the underlying millisecond time of the date will be coerced in such a way that methods like getDate
and getHours
will have the same values before and after the conversion.0
will be returned.Please note, these methods directly modify the object. Use clone if you need a copy.
true
if the XDate is a valid date, false
otherwiseThe following utilities are members of the XDate class and are not associated with a specific XDate instance:
new XDate(dateString)
instead.new XDate()
instead.Many of XDate‘s methods return a reference to the same XDate object. This allows you to "chain" operations together and makes for more concise code:
d1=newXDate();d2=d1.clone().setUTCMode(true).setDate(1).addMonths(1).addYears(2);
XDate attempts to be "backwards-compatible" with the native Date object. However, there are two small departures that were made:
If you‘ve never noticed, a native Date object returns it‘s millisecond value every time there is a "set" method. This is not very helpful. In the same situations, an XDate will return a reference to itself to allow for chaining. This is much more useful, but does not match the way the native Date works.
Also, when a native Date is concatenated with a string (with&n
[Javascript] 轻量级的JavaScript日期处理类库xDate使用指南
标签:des style http io ar color os 使用 sp
原文地址:http://www.cnblogs.com/jqmtony/p/4109205.html