Compare two dates in JS

Question

I want to compare the user\'s birthday against today\'s date and get the number of days in between. The birthday they enter will be in the form of 12/02/1987 in an

Answer 1

I wrote a lightweight date library called Moment.js to handle stuff like this.

var birthday = moment('12/02/1987', 'MM-DD-YYYY');
var inputDate = moment(element.value, 'MM-DD-YYYY');
var diff = birthday.diff(inputDate, 'days'); 

http://momentjs.com/docs/#/displaying/difference/

Answer 2

You'll need to first parse element.value as a date:

difference = today - new Date(element.value);

http://jsfiddle.net/gilly3/3DKfy/