Nan value when calculate difference between two dates

Question

I want to calculate the difference between two dates but the result I get is NaN, this is my code:

 var date1 = $("#dateb").val();
 var date2 = $("#datea").val();
 var date_difference = parseInt((date1-date2)/(24*3600*1000));
 alert(date_difference);  // NaN

Notice in my datepicker I am using this format:

$('.datePicker').datepicker({
   format: 'yyyy/mm/dd'
{);

You would need to convert the text to an actual Date() object first... — Steve, Nov 02 '17 at 11:50
Moment.js is a good library for manipulating dates easily. https://momentjs.com/ — Steve, Nov 02 '17 at 11:51
first search https://stackoverflow.com/questions/3224834/get-difference-between-2-dates-in-javascript — Álvaro Touzón, Nov 02 '17 at 12:03
Possible duplicate of [Get difference between 2 dates in JavaScript?](https://stackoverflow.com/questions/3224834/get-difference-between-2-dates-in-javascript) — MUlferts, Nov 02 '17 at 12:13

score 1 · Answer 1 · answered Feb 04 '19 at 17:21

1

Your issue is that you must convert the dates into Date objects before subtracting them:

var date1 = new Date($("#dateb").val());
var date2 = new Date($("#datea").val());
var date_difference = Math.ceil((date2 - date1) / (1000 * 60 * 60 * 24));

answered Feb 04 '19 at 17:21

buydadip

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score 0 · Answer 2 · edited Feb 04 '19 at 23:43

0

i didnt see how is the val of both inputs, expecting goes in this match MM-dd-yyy", this is an aproximation of would be:

var date1 = +new Date(2017,1,9).getTime();
var date2 = +new Date('09-10-2017').getTime();
var date_difference=(date1-date2)/(24*3600*1000);
console.log(date1, date2, new Date(date_difference));

Expect it help you

edited Feb 04 '19 at 23:43

buydadip

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answered Nov 02 '17 at 11:54

Álvaro Touzón

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Thanks Steve And Alvaro Touzon the code dont work, my first code work in Format MM-dd-yyy but me i want this format yyyy/mm/dd – C.Azzeddine Nov 02 '17 at 12:06
yo do like @Sanyami Vaidya, to split the value as you needed and JS need – Álvaro Touzón Nov 02 '17 at 12:09
Tnanks alvaro it work for me using the solution of Sanyami Vaidya thanks for you – C.Azzeddine Nov 02 '17 at 13:42

score 0 · Answer 3 · answered Nov 02 '17 at 12:10

Here is a snippet with a working example from another SO question. Just run the snippet below to see how it returns a count of days for the difference between the two dates:

var date1 = new Date("7/13/2017");
var date2 = new Date("12/15/2017");
var timeDiff = Math.abs(date2.getTime() - date1.getTime());
var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24)); 
alert(diffDays);

score -1 · Accepted Answer · answered Nov 02 '17 at 12:02

Try this,

first, convert into date

function parseDate(input) {
    // Transform date from text to date
    var parts = input.match(/(\d+)/g);
    // new Date(year, month [, date [, hours[, minutes[, seconds[, ms]]]]])
    return new Date(parts[0], parts[1] - 1, parts[2]); // months are 0-based
}
var date1 = parseDate($("#dateb").val());
var date2 = parseDate($("#datea").val());
var diff = date1 - date2 ; 
var date_difference=parseInt(diff /(24*3600*1000));
alert(date_difference);

Nan value when calculate difference between two dates

4 Answers4