compare two date using javascript

Question

I have two date in which one is dd-mm-yyyy hh:mm format and another in dd-mm-yyyy (D1) format fristly i split the dd-mm-yyyy hh:mm format date to get dd-mm-yyyy (D2) format only then i compare the date D2 and D1 like

var D1 = new Date(); 
var D2 = new Date(); 
// D1 = 03-05-2014  this date take as an example
// D2 = 28-04-2014 00:00  this date take as an example
// D1 and D2 are taken by input fields.
    split the D2 date

dat = D2.split(' ');
D2 = dat[0];
//finally D2 is 28-04-2014
if(D2<=D1)
{
  echo "ok";
}
else{
  echo "something is wrong";
}

I am always getting the else part, is this because i split the date from 28-04-2014 00:00 to 28-04-2014 ?

actually it compare only day i don't know why, it don't compare whole date — Mr. Tomar
– Mr. Tomar, Commented May 3, 2014 at 10:46

gurbinder · Accepted Answer · 2017-01-23 11:43:23Z

7

dateFirst = D1.split('-');
dateSecond = D2.split('-');
var value = new Date(dateFirst[2], dateFirst[1], dateFirst[0]); //Year, Month, Date
var current = new Date(dateSecond[2], dateSecond[1], dateSecond[0]);

than use the if condition

if(D2<=D1)
{
console.log('ok');
}
else
{
console.log('something is wrong');
}

edited Jan 23, 2017 at 11:43

gurbinder

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answered Sep 16, 2014 at 11:34

harendar

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Comments

underscore · Accepted Answer · 2014-05-03 10:50:27Z

5

This is you need actually

var D1 = "03-05-2014";
var D2 = "28-04-2014 00:00";

if ((new Date(D1).getTime()) >= (new Date(D2).getTime())) {
    alert('correct');
} else {
    alert('wrong');
}

WORKING DEMO

edited May 3, 2014 at 10:50

answered May 3, 2014 at 10:43

underscore

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3 Comments

Mr. Tomar Over a year ago

by this i have no need to split date to get 28-04-2014 from 28-04-2014 00:00 ?

underscore Over a year ago

yes.parse any date string to object and compare times

Paul S. Over a year ago

You don't need to getTime because of how valueOf a Date is defined

Abimbola Esuruoso · Accepted Answer · 2014-05-03 11:31:51Z

3

That is a string comparison you are doing, not a date comparison

In terms of strings... 2 is greater than 0... That's why you always hit the "something is wrong" statement

EDIT: This is an explanation of what went wrong // Creates a date variable var D1 = new Date();

// Creates another date variable
var D2 = new Date();

// Converts this date variable into a string
D1 = 03-05-2014 

// This is too is converted into a string
D2 = 28-04-2014 00:00

    dat = D2.split(' ');
D2 = dat[0];

//finally D2 is 28-04-2014  <-- true, but it is a string
if(D2<=D1){    //   <-- At this point you are doing a string comparison

        echo "ok";

} else {

    echo "something is wrong";

}

EDIT: This is a possible solution. . .

Instead of that, do this

var D1 = new Date();
var D2 = new Date();

if(D2.getTime() <= D1.getTime()){
    echo "ok";
} else {
    echo "something is wrong";
}

EDIT: If you are getting it from an input field, then do this

// Make sure you dates are in the format YYYY-MM-DD.
    // In other words, 28-04-2014 00:00 becomes 2014-04-28 00:00
// Javascript Date only accepts the ISO format by default
var D1 = new Date( $('#input1#').val() );
var D2 = new Date( $('#input2#').val() );

    if(D2.getTime() <= D1.getTime()){
    echo "ok";
} else {
    echo "something is wrong";
}

edited May 3, 2014 at 11:31

answered May 3, 2014 at 10:40

Abimbola Esuruoso

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4 Comments

underscore Over a year ago

this has to be a comment

Mr. Tomar Over a year ago

i take variable date type

Abimbola Esuruoso Over a year ago

Tarzan, you did make it a date at the beggining....but later you changed it into a string using D1 = 03-05-2014. Look at my answer for an explanation and solution.

Mr. Tomar Over a year ago

no no i am taking date from input field, here i mention only to take as an example

Pardeep Dhingra · Accepted Answer · 2016-02-16 04:58:25Z

0

Try:

var msg = new Date("03-05-2014").getTime() >= new Date("28-04-2014 00:00").getTime() ? 'Correct' : 'Wrong';
alert(msg);

edited Feb 16, 2016 at 4:58

Pardeep Dhingra

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answered Feb 15, 2016 at 22:44

Natarajan Ganapathi

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Comments

Alex · Accepted Answer · 2016-09-07 10:14:43Z

0

var now = new Date();
var end = new Date(//some other date hear);
if(now>end)
{
     console.log('now=',now);
}
else
{
    console.log('end=',end);
}

answered Sep 7, 2016 at 10:14

Alex

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Comments

Bachas · Accepted Answer · 2017-09-20 11:31:56Z

You can date compare as most simple and understandable way like.

<input type="date" id="getdate1" />   //with time include
<input type="date" id="getdate2" /> // without time include

so firstly write a common method to parse date method.

    <script type="text/javascript">
                function parseDate(input) {   
                  var parts = input.split(' ');
              var datecomp=parts[0];  // will get 
              var timecomp=parts[1];  // will get time
                  var dparts=datecomp.split('-');
             if(timecomp!=undefined && timecomp!=null){ //if there is like
                             var tparts=timecomp.split(':');
     return new Date(dparts[2], dparts[1]-1, dparts[0], tparts[0], tparts[1]); 


 }else{  // for when no time is givin
    return new Date(dparts[2], dparts[1]-1, dparts[0]); 
                                              }
                                             return "";
                                              }
            </script>

by here you can call above method

<script type="text/javascript">

              $(document).ready(function(){
              //parseDate(pass in this method date);
                    Var Date1=parseDate($("#getdate1").val());
                        Var Date2=parseDate($("#getdate2").val());
               //use any oe < or > or = as per ur requirment 
               if(Date1 = Date2){
         return false;  //or your code {}
}
 });
    </script>

Just use parseDate method and compare any type of the date.

suneetha · Accepted Answer · 2014-05-03 10:41:25Z

-1

Convert them into milliseconds, then do comparision

answered May 3, 2014 at 10:41

suneetha

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2 Comments

martin Over a year ago

How would you do that?

mathielo Over a year ago

This should be a comment. If you want to, you could turn it into a full answer by adding more detailed information and/or examples.

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