compare dates with time in javascript

Question

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Compare dates with JavaScript

I want to find which one is greater from 2 dates with time that is in the following format in javascript

date1=2-11-2012 13:40:00 date2=01-11-2012 10:40:00

@Pragnesh Chauhan on 6 questions! – Luca Borrione Nov 02 '12 at 07:18 — Luca Borrione, Nov 02 '12 at 07:18

alex · Accepted Answer · 2012-11-02T07:19:59.547

11

Hopefully you can learn something...

Create Date objects using the Date constructor.
Understand how comparison operator internally calls valueOf(), and what that means for a Date object.
Understand how comparison operators work (e.g. >).
Understand conditions and their Boolean outputs.

Then, you may come up with something like...

var isLarger = new Date("2-11-2012 13:40:00") > new Date("01-11-2012 10:40:00");

edited Nov 02 '12 at 07:19

answered Nov 02 '12 at 07:14

alex

1

correct answer, but is the `+` before those dates necessary? i think you can compare Date objects directly. – Dennis Nov 02 '12 at 07:17
@Chips_100 I was confused for when you need them. The comparison operator seems to call their `valueOf()` implicitly. – alex Nov 02 '12 at 07:21
new Date("2-11-2012 13:40:00") will give an invalid date object and +new Date("2-11-2012 13:40:00") will give NaN. How they can be compared? – Ravindra Gullapalli Nov 02 '12 at 07:21
@RavindraGullapalli [It doesn't give me an invalid date](http://cl.ly/image/3o2f1a0P1v12). – alex Nov 02 '12 at 07:22
@alex [Check This](http://twitpic.com/b9k7p7) – Ravindra Gullapalli Nov 02 '12 at 07:35
new Date("2-11-2012 13:40:00") > new Date("01-12-2012 10:40:00"); this is also giving "true" only. so its not working – albert Jegani Feb 19 '15 at 10:58
@albertJegani If you look at the dates in those objects, you can see that the first one is 11th Feb 2012 and the second is 12th Jan 2012, so the comparison *is* correct. Your expectations at how the string would be parsed is incorrect. – alex Feb 19 '15 at 22:27
yes alex, its correct – albert Jegani Feb 20 '15 at 09:41

score 1 · Answer 2 · edited Nov 02 '12 at 09:22

1

var x=new Date();
x.setFullYear(2100,0,14);
var y=new Date();
y.setFullYear(2100,0,20);

if (x>y)
{
 alert("Message1");
}
else
{
alert("Message2");
}

edited Nov 02 '12 at 09:22

Pragnesh Chauhan

answered Nov 02 '12 at 07:16

vikbehal

The question is of comparing two given dates. not a particular date with today. Please improve your answer. – Ravindra Gullapalli Nov 02 '12 at 07:23
@RavindraGullapalli, Like x you can go for another y. – vikbehal Nov 02 '12 at 07:27
+1 I know that. Now it is perfect. – Ravindra Gullapalli Nov 02 '12 at 07:41

2 Answers2