JS on the operation of the time

JS Time Operation Daquan

1. Get the start and end of each month.

2. Get the start and end of each quarter.

3, get the current quarter.

4. Convert date to string (supports various formats)

...

5, not to be continued to continue to add

String.prototype.padingstar=function(totallength,padingstr= "") {            if(Totallength <= This. Length) {                return  This; }            varPadlength = Totallength- This. Length; if(Padlength <=padingstr.length) {returnPadingstr.substring (0, Padlength) + This; } Else {                varLen = padlength/padingstr.length, n = 1,str= ";  while(n<Len) {STR+=Padingstr; N++; }                returnSTR + padingstr.substring (0, Padlength-(n-1) * padingstr.length) + This; }} String.prototype.padingEnd=function(Totallength, padingstr= "") {            //After the beginning of the completion of the complete            if(Totallength <= This. Length) {                return  This; }            varPadlength = Totallength- This. Length; if(Padlength <=padingstr.length) {returnPadingstr.substring (0, Padlength) + This; } Else {                varLen = padlength/padingstr.length, n = 0,str= ";  while(n<Len) {STR+=Padingstr; N++; }                return  This+ padingstr.substring (0, Padlength-(n-1) * padingstr.length) +str; }        }        //get the start of the current monthDate.prototype.starofmonth=function() {            return NewDate ( This. getFullYear (), This. GetMonth (), 1, 00, 00, 00); }        //get the end of the current monthDate.prototype.endofmonth=function() {            return NewDate ( This. getFullYear (), This. GetMonth () + 1, 0, 23, 59, 59); }        //gets the start time of the current quarterDate.prototype.starofquarter=function() {            return NewDate ( This. getFullYear (), ( This. Getquarter ()-1) * 3, 01, 00, 00, 00); }        //Gets the end time of the current quarterDate.prototype.endofquarter=function() {            return NewDate ( This. getFullYear (), This. Getquarter () * 3-1, 31, 23, 59, 59); }        //get the quarter for the current timeDate.prototype.getquarter=function() {            returnMath.ceil (( This. GetMonth () + 1)/3); }        //get the start of the year that corresponds to the current timeDate.prototype.starofyear=function() {            return NewDate ( This. getFullYear (), 01, 01, 00, 00, 00); }         //Gets the end of the current time corresponding yearDate.prototype.endofyear=function() {            return NewDate ( This. getFullYear (), 12, 31, 23, 59, 59); }        //format the time as a stringDate.prototype.toDateString =function(format) {if(typeof(format) = = "Undefined") {                return  This. toString (); }            //Perhaps my first thought was that            if(/y{4}/. Test (format)) {Format= Format.replace (/yyyy/g, This. getFullYear ()); }            if(/y{2}/. Test (format)) {Format= Format.replace (/y{2}/g, This. getFullYear (). toString (). substr (2)); }            if(/m{2}/. Test (format)) {Format= Format.replace (/mm/, This. GetMonth (). toString (). Padingstar (2,0)); }            if(/dd/. Test (format)) {Format= Format.replace (/dd/, This. GetDate (). toString (). Padingstar (2, ' 0 ')); }            if(/hh/. Test (format)) {Format= Format.replace (/hh/g, This. GetHours (). toString (). Padingstar (2, ' 0 ')); }            if(/hh/. Test (format)) {Format= Format.replace (/hh/g, (Hour < hour:hour-12). ToString (). Padingstar (2, ' 0 ')); }            if(/mm/. Test (format)) {Format= Format.replace (/mm/g, This. getminutes (). toString (). Padstart (2, ' 0 ')); }            if(/ss/. Test (format)) {Format= Format.replace (/ss/g, This. getseconds (). toString (). Padstart (2, ' 0 ')); }            returnformat; }                //get two time-separated daysdate.prototype.betweendays=function(date) {varDayspan = (Date.parse ( This)-Date.parse (Date))/86400000; returnDayspan; }

GitHub Address: Https://github.com/gdoujkzz/JsDate.git

JS on the operation of the time