[javascript] JavaScript, get date of the next day

I have the following script which returns the next day:

function today(i)
    {
        var today = new Date();
        var dd = today.getDate()+1;
        var mm = today.getMonth()+1;
        var yyyy = today.getFullYear();

        today = dd+'/'+mm+'/'+yyyy;

        return today;   
    }

By using this:

today.getDate()+1;

I am getting the next day of the month (for example today would get 16).

My problem is that this could be on the last day of the month, and therefore end up returning 32/4/2014

Is there a way I can get the guaranteed correct date for the next day?

Using Date object guarantees that. For eg if you try to create April 31st :

new Date(2014,3,31)        // Thu May 01 2014 00:00:00

Please note that it's zero indexed, so Jan. is 0, Feb. is 1 etc.

Copy-pasted from here: Incrementing a date in JavaScript

Three options for you:

Using just JavaScript's Date object (no libraries):

var today = new Date();
var tomorrow = new Date(today.getTime() + (24 * 60 * 60 * 1000));

Or if you don't mind changing the date in place (rather than creating a new date):

var dt = new Date();
dt.setTime(dt.getTime() + (24 * 60 * 60 * 1000));

Edit: See also Jigar's answer and David's comment below: var tomorrow = new Date(); tomorrow.setDate(tomorrow.getDate() + 1);

Using MomentJS:

var today = moment();
var tomorrow = moment(today).add(1, 'days');

(Beware that add modifies the instance you call it on, rather than returning a new instance, so today.add(1, 'days') would modify today. That's why we start with a cloning op on var tomorrow = ....)

Using DateJS, but it hasn't been updated in a long time:

var today = new Date(); // Or Date.today()
var tomorrow = today.add(1).day();