Nodejs Date Add add(amount,field)

Method Source Code

Date.prototype.add=function(amount,field){
   if(amount){/*ww  w.  ja  v a 2 s.  c  om*/
      switch (field)
      {
         case "y":
            this.setFullYear(this.getFullYear() + amount);
            break;
         case "q":
            this.setMonth(this.getMonth() + amount * 3);
            break;
         case "m":
            this.setMonth(this.getMonth() + amount);
            break;
         case "w":
            this.setDate(this.getDate() + amount * 7);
            break;
         default:
            this.setDate(this.getDate() + (amount));
            break;
      }
   }
   return this;
}

Related

1. DateAdd(strInterval, Number)

   Date.prototype.DateAdd = function(strInterval, Number) {
     var dtTmp = this;
     switch (strInterval) {
     case 's':
       return new Date(Date.parse(dtTmp) + (1000 * Number));
     case 'n':
       return new Date(Date.parse(dtTmp) + (60000 * Number));
     case 'h':
       return new Date(Date.parse(dtTmp) + (3600000 * Number));
   ...
   

2. add(interval, value)

   Date.MILLI = 'ms';
   Date.SECOND = 's';
   Date.MINUTE = 'mi';
   Date.HOUR = 'h';
   Date.DAY = 'd';
   Date.MONTH = 'mo';
   Date.YEAR = 'y';
   Date.prototype.add = function(interval, value){
     var d = this.clone();
   ...
   

3. add(thisMany)

   Date.prototype.add = function(thisMany) {
     var self = this;
     return { minutes: function() {
       var newDate = new Date(self);
       newDate.setMinutes(self.getMinutes() + thisMany);
       return newDate; }};
   };
   

4. addDate(num)

   Number.prototype.addDate=function(num){
       var date=this;
       var dates=[];
       var d=new Date(Number(date).dateFormat());
       d.setDate(d.getDate()+(num));
       dates.push(d.getFullYear());
       dates.push(Number(d.getMonth()+1).addZero());
       dates.push(Number(d.getDate()).addZero());
       var next_date=dates.join("");
   ...
   

5. addMilliseconds(value)

   Date.prototype.addMilliseconds = function(value)
       this.setTime(this.getTime() + value);
       return this;
   };