Add days to DateTime using Java Script

Question

How to add days to current DateTime using Java Script. Does Java Script have a built in function like .Net AddDay?

Answer 1

var today = new Date();
var tomorrow = new Date();
tomorrow.setDate(today.getDate()+1);

Be careful, because this can be tricky. When setting "tomorrow", it only works because it's current value matches the year and month for "today". However, setting to a date number like "32" normally will still work just fine to move it to the next month.

Answer 2

You can create one with:-

 Date.prototype.addDays = function(days)
 {
     var dat = new Date(this.valueOf())
     dat.setDate(dat.getDate() + days);
     return dat;
 }

var dat = new Date()


alert(dat.addDays(5))

The problem with using setDate directly is that it's mutator and that sort of thing is best avoided. ECMA saw fit to treat Date as a mutable class rather than an immutable structure.

Answer 3

i use

var today = new Date();
var tomorrow = new Date();
tomorrow.setDate(today.getDate()+1);

This will deal with end of months so adding 32 days will work.

HTH