Javascript Date Format (JS Date Format)

Method 1:

// Converts a date to a string in the specified format.
// Month (M), Day (D), hour (H), minute (M), second (s), quarter (q) can use 1-2 placeholders,
// Year (y) can use 1-4 placeholders, Millisecond (s) can only use 1 placeholder (1-3 digits)
// Example:
// (New date (). Format ("yyyy-mm-dd hh: mm: Ss. s") ==>2006-07-02 08:09:04. 423
// (New date (). Format ("yyyy-m-d h: M: S. S") ==> 2006-7-2. 18
Date. Prototype. format = Function (FMT ){ // Author: meizz
VaR O = {
"M + ": This . Getmonth () + 1, // Month
"D + ": This . Getdate (), // Day
"H + ": This . Gethours (), // Hours
"M + ": This . Getminutes (), // Minute
"S + ": This . Getseconds (), // Seconds
"Q +": Math. Floor (( This . Getmonth () + 3)/3 ), // Quarter
"S ": This . Getmilliseconds () // Millisecond
};
If (/(Y +)/. Test (FMT) FMt = FMT. Replace (Regexp. $1 ,( This . Getfullyear () + ""). substr (4-Regexp. $1. Length ));
For ( VaR K In O)
If ( New Regexp ("(" + K + ")"). test (FMT) FMt = FMT. replace (Regexp. $1, (Regexp. $1. length = 1 )? (O [k]): ("00" + O [k]). substr ("" + O [k]). Length )));
Return FMT;
}

Call:

VaR time1 = new date (). format ("yyyy-mm-dd"); var time2 = new date (). format ("yyyy-mm-dd hh: mm: SS ");

Method 2:

<Script language = "JavaScript" type = "text/JavaScript">
<! -- /* ** Extended Date: converts a date to a string * month (M), Day (D), 12 hours (H), and 24 hours (h) in the specified format), minute (M), second (s), Week (E), quarter (q)
You can use 1-2 placeholders * Year (Y), 1-4 placeholders, Millisecond (s), and only 1 placeholder (1-3 digits) * eg: * (New
Date (). pattern ("yyyy-mm-dd hh: mm: Ss. s") ==>2006-07-02 08:09:04. 423
* (New date (). pattern ("yyyy-mm-dd e hh: mm: SS") => 20:09:04
* (New date (). pattern ("yyyy-mm-dd EE hh: mm: SS") => 08:09:04 Tuesday
* (New date (). pattern ("yyyy-mm-dd EEE hh: mm: SS") => 08:09:04 Tuesday
* (New date (). pattern ("yyyy-m-d h: M: S. S") => 2006-7-2. 18
*/
Date. Prototype. pattern = Function (FMT ){
VaR O = {
"M + ": This . Getmonth () + 1, // Month
"D + ": This . Getdate (), // Day
"H + ": This . Gethours () % 12 = 0? 12: This . Gethours () % 12, // Hours
"H + ": This . Gethours (), // Hours
"M + ": This . Getminutes (), // Minute
"S + ": This . Getseconds (), // Seconds
"Q +": Math. Floor (( This . Getmonth () + 3)/3), // quarter
"S ": This . Getmilliseconds () // Millisecond
};
VaR Week = {
"0": "/u65e5 ",
"1": "/u4e00 ",
"2": "/u4e8c ",
"3": "/u4e09 ",
"4": "/u56db ",
"5": "/u4e94 ",
"6": "/u516d"
};
If (/(Y +)/. Test (FMT )){
FMt = FMT. Replace (Regexp. $1 ,( This . Getfullyear () + ""). substr (4-Regexp. $1. Length ));
}
If (/(E +)/. Test (FMT )){
FMt = FMT. Replace (Regexp. $1, (Regexp. $1. length> 1 )? (Regexp. $1. length> 2? "/U661f/u671f": "/u5468"): "") + week [ This . Getday () + ""]);
}
For ( VaR K In O ){
If ( New Regexp ("(" + K + ")"). Test (FMT )){
FMt = FMT. Replace (Regexp. $1, (Regexp. $1. Length = 1 )? (O [k]): ("00" + O [k]). substr ("" + O [k]). Length )));
}
}
Return FMT;
}

VaR Date = New Date ();
Window. Alert (date. pattern ("yyyy-mm-dd hh: mm: SS "));
// -->
</SCRIPT>

Method 3:

Date. Prototype. format = Function (Mask ){
VaR D = This ;

VaRZeroize =Function(Value, length ){

If(! Length) Length = 2;

Value = string (value );

For(VaRI = 0, zeros = ''; I <(length-value. Length); I ++ ){

Zeros + = '0 ';

}

ReturnZeros + value;

};

ReturnMask. Replace (/"[^"] * "| '[^'] * '|/B (? : D {
1, 4
} | M {
1, 4
} | YY (? : Yy )? | ([Hhmstt])/1? | [Llz])/B/g,Function($0 ){

Switch($0 ){

Case'D ':
ReturnD. getdate ();

Case'Dd ':
ReturnZeroize (D. getdate ());

Case'Ddd ':
Return['Sun', 'mon ', 'tue', 'wed', 'thr', 'fri', 'sat '] [D. getday ()];

Case'Dddddd ':
Return['Sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'Friday', 'saturday'] [D. getday ()];

Case'M ':
ReturnD. getmonth () + 1;

Case'Mm ':
ReturnZeroize (D. getmonth () + 1 );

Case'Mmm ':
Return['Jan ', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep ', 'oct', 'nov', 'dec '] [D. getmonth ()];

Case'Mmmm ':
Return['January ', 'february', 'march', '0000l', 'may', 'june', 'july', 'August ', 'September ', 'October ', 'november', 'december'] [D. getmonth ()];

Case'Yy ':
ReturnString (D. getfullyear (). substr (2 );

Case'Yyyy ':
ReturnD. getfullyear ();

Case'H ':
ReturnD. gethours () % 12 | 12;

Case'Hh ':
ReturnZeroize (D. gethours () % 12 | 12 );

Case'H ':
ReturnD. gethours ();

Case'Hh ':
ReturnZeroize (D. gethours ());

Case'M ':
ReturnD. getminutes ();

Case'Mm ':
ReturnZeroize (D. getminutes ());

Case'S ':
ReturnD. getseconds ();

Case'Ss ':
ReturnZeroize (D. getseconds ());

Case'L ':
ReturnZeroize (D. getmilliseconds (), 3 );

Case'L ':
VaRM = D. getmilliseconds ();

If(M> 99) M = math. Round (M/10 );

ReturnZeroize (m );

Case'TT ':
ReturnD. gethours () <12? 'Am': 'pm ';

Case'TT ':
ReturnD. gethours () <12? 'Am': 'pm ';

Case'Z ':
ReturnD. toutcstring (). Match (/[A-Z] + $ /);

//Return quoted strings with the surrounding quotes removed

Default:
Return$0. substr (1, $0. Length-2 );

}

});

};