Nodejs Date Get getDST()

Method Source Code

Date.prototype.getDST = function() {
    return this.getTimezoneOffset() - this.getStdTimezone();
}

Related

1. compare(targetDate)

   Date.prototype.compare = function(targetDate){
     if(this.getTime() == targetDate.getTime()) return 0;
     var result = (this.getTime() > targetDate.getTime()) ? 1 : -1;
     return result;
   

2. dateEquals(targetDate)

   Date.prototype.dateEquals = function (targetDate) {
     let sourceDate = this;
     if (targetDate instanceof Date) {
       return (sourceDate.getDate() == targetDate.getDate()) && (sourceDate.getMonth() == targetDate.getMonth()) && (sourceDate.getFullYear() == targetDate.getFullYear());
     } else {
       return false;
   };
   

3. getAge()

   Date.prototype.getAge = function() {
       var today = new Date();
       var birthDate = this;
       var age = today.getFullYear() - birthDate.getFullYear();
       var m = today.getMonth() - birthDate.getMonth();
       if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate())) {
           age--;
       return age;
   ...
   

4. getAtom()

   Date.prototype.getAtom = function()
     return   this.getFullYear() + '-' + 
       this.getMonthZero() + '-' + 
       this.getDateZero() + 'T' + 
       this.getHoursZero() + ':' + 
       this.getMinutesZero() + ':' + 
       this.getSecondsZero() + 'Z';
   };
   ...
   

5. getCode()

   Date.prototype.getCode = function(){
       var start = new Date(this.getFullYear(), 0, 0);
       var diff = this - start;
       var oneDay = 1000 * 60 * 60 * 24;
       var day = Math.floor(diff / oneDay);
       return ( 24 * day ) + this.getHours();
   };
   

6. getDate2()

   Date.prototype.getDate2 = function () {
      var date = this.getDate();
      return (date < 10 ? '0' : '') + date;
   };
   

7. getDateDiff(difference)

   function getDateDiff(difference) {
     var ret    = {};
     ret.days  = Math.floor(difference / 1000 / 60 / 60 / 24);
     ret.hours  = Math.floor(difference / 1000 / 60 / 60 - (24 * ret.days));
     ret.mins  = Math.floor(difference / 1000 / 60 - (24 * 60 * ret.days) - (60 * ret.hours));
     ret.secs  = Math.floor(difference / 1000 - (24 * 60 * 60 * ret.days) - (60 * 60 * ret.hours) - (60 * ret.mins));
     return ret;
   

8. getDateDifference(otherDate)

   Date.prototype.getDateDifference = function(otherDate){
     var oneDay = 1000*3600*24;
     var d = new Date(+this);
     d.setHours(0,0,0,0);
     otherDate.setHours(0,0,0,0);
     var timeDiff = d.getTime() - otherDate.getTime();
     return Math.floor(timeDiff/oneDay);
   

9. getDateOffset(target)

   Date.prototype.getDateOffset = function(target) {
       var milliSeconds = target.getTime() - this.getTime();
       return Math.ceil(milliSeconds/1000/60/60/24);
   };