Add days to JavaScript Date

Question

How to add days to current Date using JavaScript? Does JavaScript have a built in function like .NET's AddDay()?

Answer 1

You can create one with:-

Date.prototype.addDays = function(days) {     var date = new Date(this.valueOf());     date.setDate(date.getDate() + days);     return date; }  var date = new Date();  console.log(date.addDays(5));

This takes care of automatically incrementing the month if necessary. For example:

8/31 + 1 day will become 9/1.

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