comparing 2 dates with javascript

Question

I want to compare 2 dates in the following format shown below in variables a and b . I want to check if a is greater than b but the code below isnt working since its not a regular number

var a = "4/29/2015";
var b = "4/10/2015";

if(a > b){
alert("working");
}

Please check : http://www.comptechdoc.org/independent/web/cgi/javamanual/javadate.html — Jules, Apr 29 '15 at 12:05
http://stackoverflow.com/questions/492994/compare-two-dates-with-javascript — halafi, Apr 29 '15 at 12:05
some extra info about the Date object: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date — rafaelcastrocouto, Apr 29 '15 at 12:06
possible duplicate of [compare two dates](http://stackoverflow.com/questions/492994/compare-two-dates-with-javascript) — sachin.ph, Apr 29 '15 at 12:07

score 3 · Accepted Answer · answered Apr 29 '15 at 12:06

3

Convert the strings to Date objects.

var a = new Date("4/29/2015");
var b = new Date("4/10/2015");

if (a > b) {
  console.log(a + " is greater than " + b);
}

answered Apr 29 '15 at 12:06

forgivenson

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score 0 · Answer 2 · answered Apr 29 '15 at 12:08

0

Use javascript's Date object:

//2nd Argument month goes from 0(January) to 11(December)
var a = new Date(2015, 3, 29);
var b = new Date(2015, 3, 10);

if(a > b){
  alert("working");
}

answered Apr 29 '15 at 12:08

Curious

2,783
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But the OP's input dates are in string format. How does he extract the parts of the date? – nnnnnn Apr 29 '15 at 12:14
Well, even date strings can be used to construct `Date` objects, I see there are other answers using the same... – Curious Apr 29 '15 at 12:16

comparing 2 dates with javascript

2 Answers2