Format the date in js, and format the js date

Format the date in js, and format the js date

Sometimes, the date in js is displayed in the format of yyyy/MM/dd, but I need the format of yyyy-MM-dd

Simple and crude direct replace is always not good, or it is still a little rough to splice it through the related methods of the Date object.

If it can be formatted,

I collected some information on the Internet, modified and debugged it to make it available. OK, the following code:

(1) The formatting method of date Data needs to be expanded first.

 

// Extended Date formatting method Date. prototype. parseStr = function (format) {var YYYY = this. getFullYear (); // 2011 // var YY = YYYY. substring (2); // 11 format = format. replaceAll ("@ YYYY @", YYYY); // format = format. replaceAll ("@ YY @", YY); var M = this. getMonth () + 1; var MM = (M <10 )? "0" + M: M; // var MMM = mths [M-1]; // format = format. replaceAll ("@ MMM @", MMM); format = format. replaceAll ("@ MM @", MM); format = format. replaceAll ("@ M @", M); var D = this. getDate (); var DD = (D <10 )? "0" + D: D; format = format. replaceAll ("@ DD @", DD); format = format. replaceAll ("@ D @", D); var h = this. getHours (); var hh = (h <10 )? "0" + h: h; format = format. replaceAll ("@ hh @", hh); format = format. replaceAll ("@ h @", h); var m = this. getMinutes (); var mm = (m <10 )? "0" + m: m; format = format. replaceAll ("@ mm @", mm); format = format. replaceAll ("@ m @", m); var s = this. getSeconds (); var ss = (s <10 )? "0" + s: s; format = format. replaceAll ("@ ss @", ss); format = format. replaceAll ("@ s @", s); // var dayOfWeek = this. getDay (); // format = format. replaceAll ("@ WEEK @", WEEKs [dayOfWeek]); // format = format. replaceAll ("@ WEK @", WEKs [dayOfWeek]); return format ;}

 

(2) because the string. replaceAll method is used, this is also a string extension:

String.prototype.replaceAll = function (s1, s2) {    return this.replace(new RegExp(s1, "gm"), s2);}

(3) write the formatting method:

// Date Formatting function parseDate (dateStr, hasTime) {var Date = new date (dateStr. replace (/-/g, "/"); if (hasTime) return date. parseStr ("@ YYYY @-@ MM @-@ DD @ hh @: @ mm @: @ ss @"); return date. parseStr ("@ YYYY @-@ MM @-@ DD @");}

 

(4) specific call:

<Button value = "Date test" onclick = "t1 ()"> dd </button> <button value = "time test" onclick = "t2 () "> </button> <script> function t1 () {var str =" 2015/5/8 "; alert (parseDate (str, false);} function t2 () {var str = "10:01:02"; alert (parseDate (str, true) ;}</script>

 

OK!