如何通过在javascript中给出天数来增加日期

Question

I want to increment dates using JavaScript I used .setDate(1) to increment dates by one day but if the date is 31/11/2011 after increment becomes 1/0/2012 ,

the question is how to increment date by giving the number of days .

js

  newDate.setDate(newDate.getDate()+1);
    alert(newDate.getFullYear()+"-"+newDate.getMonth()+"-"+newDate.getDate());  

Answer 1

That is correct, because in javascript, months are indexed from 0, not 1.

You need to alert like this instead:

alert(newDate.getFullYear()+"-"+(newDate.getMonth()+1)+"-"+newDate.getDate());  

Answer 2

鉴于Javascript中的月份范围为0到11，这是没有错的。因此，当您说到31/11/2011 ，javascript可以理解的是31/12/2011 。

Answer 3

Lets make it some more clear:

var Date = new Date();
var DaysToAdd = 6;
someDate.setDate(Date.getDate() + DaysToAdd); 

Formatting Date to dd/mm/yyyy format:

var dd = Date.getDate();
var mm = Date.getMonth() + 1;
var yyyy = Date.getFullYear();

var NewDate = dd + '/'+ mm + '/'+ yyyy;

Hope this helps.

Answer 4

You can use like this, Suppose you want to increment current date by 2 days then,

var today = new Date(); // Or Date.today()
var newDate = today.add(2).day();