Add one day to date in javascript

I am sure that a lot of people asked this question but when I checked the answers it seems to me that they are wrong that what I found

var startDate = new Date(Date.parse(startdate));
//The start date is right lets say it is 'Mon Jun 30 2014 00:00:00'

var endDate = new Date(startDate.getDate() + 1);
// the enddate in the console will be 'Wed Dec 31 1969 18:00:00' and that's wrong it should be  1 july

I know that .getDate() return from 1-31 but Does the browser or the javascript increase only the day without updating the month and the year ?

and in this case Should I write an algorithm to handle this ? or there is another way ?

Note that Date.getDate only returns the day of the month. You can add a day by calling Date.setDate and appending 1.

// Create new Date instance
var date = new Date()

// Add a day
date.setDate(date.getDate() + 1)

JavaScript will automatically update the month and year for you.

EDIT:
Here's a link to a page where you can find all the cool stuff about the built-in Date object, and see what's possible: Date.

The Date constructor that takes a single number is expecting the number of milliseconds since December 31st, 1969.

Date.getDate() returns the day index for the current date object. In your example, the day is 30. The final expression is 31, therefore it's returning 31 milliseconds after December 31st, 1969.

A simple solution using your existing approach is to use Date.getTime() instead. Then, add a days worth of milliseconds instead of 1.

For example,

var dateString = 'Mon Jun 30 2014 00:00:00';

var startDate = new Date(dateString);

// seconds * minutes * hours * milliseconds = 1 day 
var day = 60 * 60 * 24 * 1000;

var endDate = new Date(startDate.getTime() + day);

JSFiddle

Please note that this solution doesn't handle edge cases related to daylight savings, leap years, etc. It is always a more cost effective approach to instead, use a mature open source library like moment.js to handle everything.

There is issue of 31st and 28th Feb with getDate() I use this function getTime and 24*60*60*1000 = 86400000

Use this function:


    function incrementDate(dateInput,increment) {
        var dateFormatTotime = new Date(dateInput);
        var increasedDate = new Date(dateFormatTotime.getTime() +(increment *86400000));
        return increasedDate;
    }

Example as below:

var dateWith31 = new Date("2017-08-31");
var dateWith29 = new Date("2016-02-29");

var amountToIncreaseWith = 1; //Edit this number to required input

console.log(incrementDate(dateWith31,amountToIncreaseWith));
console.log(incrementDate(dateWith29,amountToIncreaseWith));

function incrementDate(dateInput,increment) {
        var dateFormatTotime = new Date(dateInput);
        var increasedDate = new Date(dateFormatTotime.getTime() +(increment *86400000));
        return increasedDate;
    }

Add one day to date in javascript

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