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JS get this month, three months, this year's date plugin Datehelp

Source: Internet
Author: User
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Recently read some about object-oriented knowledge, in the recent work in the statistical query need to use this month, nearly three months, this year's date range, so the following with the idea of object-oriented to write a get date plug-in, we can use for reference.

Directly through the new DATEHELP, you can call the

var mydate = new Datehelp ({
Date: ' 2015-02-01 ',//start calculation from this date
Format: ' Yyyy/mm/dd '
});

Mydate.getthismonth ();
Mydate.getthreemonth ();
Mydate.getthisyear ();

Datehelp.js Plug-in 
/** * By calling can get this month, nearly three months, this year's date * @param obj * @constructor*/functiondatehelp (obj) {/*var obj = {date: ' 2015-02-01 ',//The type is calculated from this date: ' Month ',//month-by-year: years, months, days (day) value: ' 14 ',//forward calculation The numeric value, month and day format: ' YYYY/MM/DD '//date formats}*/     This. Date =obj.date;  This. Type =Obj.type;  This. Value = Obj.value = = undefined? obj.value:0;  This. Format = Obj.format = = undefined? Obj.format: ' Yyyy/mm/dd '; //Date and non-date formats get month day    if( This. DateinstanceofDate) {        //processing passes in a date function.         This. Year = This. Date.getfullyear ();  This. Month = This. Date.getmonth () +1;  This. Day = This. Date.getdate (); }Else{        //That handles the incoming non-date function.         This. Year = This. DATE.SUBSTR (0, 4);  This. Month = This. DATE.SUBSTR (5, 2);  This. Day = This. DATE.SUBSTR (8, 2); }}datehelp.prototype.beforedate=function(type, value) {var_type = Type | | This. Type, _value= value | | This. Value, _year= This. Year, _month= This. Month, _day= This. Day; if(_type = = ' Year ' | | _type = = ' Years ') {_year-=_value; }Else if(_type = = ' Month ' | | _type = = ' Moon ') {_year-= parseint (_VALUE/12); _month-= _value% 12; if(_month <= 0) {_year-= 1; _month+ = 12; }    }Else if(_type = = ' Day ' | | _type = = ' Days '){    }Else {    }    varDate =NewDate (_year, _month-1, _day)return  This. FormatDate (Date, This. format);} DateHelp.prototype.formatDate=function(date,fmt) {varn \ {        "m+": Date.getmonth () +1,//Month"D+": date.getdate (),//Day"H +": date.gethours (),//hours"m+": date.getminutes (),//points"S+": Date.getseconds (),//seconds"q+": Math.floor ((Date.getmonth () +3)/3),//Quarterly "S": Date.getmilliseconds ()//milliseconds    }; if(/(y+)/. Test (FMT) FMT=fmt.replace (Regexp.$1, (date.getfullyear () + ""). substr (4-regexp.$1. length));  for(varKincho)if(NewRegExp ("(" + K + ")"). Test (FMT) FMT= Fmt.replace (regexp.$1, (regexp.$1.length==1)? (O[k]): (("XX" + o[k]). substr ("" +o[k])); returnFMT;} DateHelp.prototype.getThisMonth=function() {    varFirst =NewDate ( This. Year, This. month-1); varLast =NewDate ( This. Year, This. Month, 0); return  This. FormatDate (First, This. Format) + "-" + This. FormatDate (Last, This. format);} DateHelp.prototype.getThreeMonth=function() {    return  This. Beforedate (' month ', 3) + "-" + This. Beforedate (' Day ', 0);} DateHelp.prototype.getThisYear=function() {    varFirst =NewDate ( This. year, 0, 1); varLast =NewDate ( This. year, 11, 31); return  This. FormatDate (First, This. Format) + "-" + This. FormatDate (Last, This. format);}/*//Example var mydate = new Datehelp ({date: ' 2015-02-01 ',//calculated from this date format: ' Yyyy/mm/dd '}); Console.log (Mydate.getthismon th ()); Console.log (Mydate.getthreemonth ()); Console.log (Mydate.getthisyear () );*/

HTML Test Code 
<!DOCTYPE HTML><HTML><HeadLang= "en">    <MetaCharSet= "UTF-8">    <title></title>    <Scriptsrc= "Myjs/datehelp.js"></Script></Head><Body><Script>    varmydate= Newdatehelp ({date:NewDate (),//start calculation from this dateformat:'YYYY/MM/DD'    });    Console.log (Mydate.getthismonth ());    Console.log (Mydate.getthreemonth ()); Console.log (Mydate.getthisyear ());</Script></Body></HTML>

JS get this month, three months, this year's date plugin Datehelp

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