Is it possible to make a date validation in javascript?

Question

I have to check if two dates differ more than two days. As an example, 01/14/2014 and 01/15/2014 would fit the criteria because there's only one day of difference, but 01/14/2014 and 01/18/2014 would not as the latter has 4 days of difference. The dates are in string format so I've tried all sorts of data casting but couldn't succeed. So to sum up, i want to know if it is possible to create an if statement that subtract the value of two dates that are in string format and give a error if the value is bigger than 'n'. Thanks!

http://stackoverflow.com/questions/3224834/get-difference-between-2-dates-in-javascript/15289883#15289883 — JohanVdR, Mar 30 '14 at 16:28
You really couldn't figure this out ? -> `if ( (new Date('01/14/2015').getTime() - new Date('01/15/2014').getTime()) > (1000*60*60*24*2) )` — adeneo, Mar 30 '14 at 16:30

score 1 · Answer 1 · answered Mar 30 '14 at 16:28

One solution would be to create a Javascript Date object (http://www.w3schools.com/js/js_obj_date.asp) for each date using simple string parsing, get the value in milliseconds using the .getTime() function and checking if this is greater than 1000 x 60 x 60 x 24 x 2 .

itdoesntwork · Answer 2 · 2014-03-30T16:33:29.137

0

Try

new Date("MM/DD/YYYY") - new Date("MM/DD/YYYY")

That will return a number in milliseconds.

edited Mar 30 '14 at 16:33

answered Mar 30 '14 at 16:28

itdoesntwork

4,666
3
25
38

It's not `DD/MM/YYYY` (unfortunately) – Bergi Mar 30 '14 at 16:32

JohanVdR · Accepted Answer · 2014-03-30T17:38:21.790

// https://gist.github.com/remino/1563878
// Converts millseconds to object with days, hours, minutes ans seconds.
function convertMS(ms) {
  var d, h, m, s;
  s = Math.floor(ms / 1000);
  m = Math.floor(s / 60);
  s = s % 60;
  h = Math.floor(m / 60);
  m = m % 60;
  d = Math.floor(h / 24);
  h = h % 24;
  return { d: d, h: h, m: m, s: s };
};

var start_date = '04/15/2014';
var end_date = '04/16/2014';

var diff = convertMS(Date.parse(end_date) - Date.parse(start_date));

if(diff.d > 1) {
  console.log('The difference is more than one day!');
}
else {
  console.log('The difference is just one day and therefore accepted!');
}

See the js fiddle: http://jsfiddle.net/E7bCF/11/
See the js fiddle with more than a day difference: http://jsfiddle.net/E7bCF/9/

Is it possible to make a date validation in javascript?

3 Answers3