Nodejs Day Calculate numDays()

Method Source Code

Date.prototype.numDays = function() {

  var d = new Date(this.getFullYear(), this.getMonth() + 1, 0);

  return d.getDate();

};

Related

1. getToday()

   Date.prototype.getToday = function () {
       return this.getFullYear()+'-'+this.getMonth()+'-'+this.getDate();
   

2. getToday()

   Date.prototype.getToday = function () {
       return this.getFullYear()+'-'+this.getMonth()+'-'+this.getDate();
   

3. isDST() //t is the date object to check, returns true if daylight saving time is in effect.

   Date.prototype.isDST = Date.prototype.isDST || function() { 
       var jan = new Date(this.getFullYear(),0,1);
       var jul = new Date(this.getFullYear(),6,1);
       return Math.min(jan.getTimezoneOffset(),jul.getTimezoneOffset()) == this.getTimezoneOffset();
   };
   exports.DataUtilities = {};
   

4. isLastDay()

   Date.prototype.isLastDay = function(){
       if(!this.isToDay()){
           var today = new Date();
           return this.getTime() < today.getTime();
       return false;
   };
   

5. nextDayfunciton()

   Date.prototype.nextDay = funciton() {
     let today = this.getDate();
     return new Date(this.setDate(today + 1));
   

6. past(pattern,pastDays)

   Date.prototype.past = function(pattern,pastDays){
       var pastday = new Date((this - 0) - 1000*60*60*24*pastDays);
       var pattern = pattern;    
       var dateObj = {
           "Y" : pastday.getFullYear(),
           "M" : pastday.getMonth()+1,
           "D" : pastday.getDate(),
           "h" : pastday.getHours(),
           "m" : pastday.getMinutes(),
   ...
   

7. relativeDays()

   Date.prototype.relativeDays = function() {
     var now = new Date();
     var interval = now.getTime() - this.getTime();
     interval = Math.floor(interval / (1000 * 60 * 60 * 24));
     return interval;
   };
   

8. sGetDay()

   var weekdays = ["monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"];
   Date.prototype.sGetDay = function() {
     return (this.getDay() + 6) %7;
   var d = new Date();
   var today = weekdays[d.sGetDay()];
   

9. setToMondayMidnight()

   Date.prototype.setToMondayMidnight = function() {
       var weekDay = this.getDay();
       if (weekDay === 0) { 
           weekDay = 7;
       this.setDate(this.getDate() - weekDay + 1);
       this.timeToMidnight();
   };