String date to System date compare

Question

I have two dates , first date is string coming from input text like 01-01-2011(dd-MM-yyyy) and second date is current date or system date(new Date()).

I have to compare the input date to current date(gretter or equal). I'm facing issue of NaN and did not find efficient help in google.

Any help will be appreciate.

What does the string look like? That date is obviously invalid. What does your code look like? — Tom Fenech, May 14 '14 at 11:03

score 1 · Accepted Answer · edited May 23 '17 at 12:21

1

Please try with the below code snippet.

var from = "13-05-2014".split("-");
var dt1 = new Date(from[2], from[1] - 1, from[0]);
var dt2 = new Date();
if (dt1 - dt2 > 0) {
    alert("current or future date");
}

If you want difference in detail format then please check this link.

edited May 23 '17 at 12:21

Community

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1

answered May 14 '14 at 11:14

Jayesh Goyani

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score 0 · Answer 2 · answered May 14 '14 at 11:15

var date=new Date();
var today= date.getDate()+"-"+(date.getMonth()-1)+"-"+date.getFullYear();

and compare with this date

or make two dates and use this method

function datediff(date1, date2) {
    var y1 = date1.getFullYear();
    var m1 = date1.getMonth();
    var d1 = date1.getDate();
    var y2 = date2.getFullYear();
    var m2 = date2.getMonth();
    var d2 = date2.getDate();
    if (d1 < d2) {
        m1--;
        var date=new Date(y2, m2, 1, 12);
        date.setDate(0);
        d1 += date.getDate();
    }
    if (m1 < m2) {
        y1--;
        m1 += 12;
    }
    return [y1 - y2, m1 - m2, d1 - d2];
}

if it returned [0,0,0] two dates are equal

score 0 · Answer 3 · answered May 14 '14 at 11:32

<!DOCTYPE html>
<html>
<head>
<script>

Date.prototype.format=function(){
    var year=this.getFullYear();
    var month=this.getMonth();
    var date=this.getDate();
    return year+"-"+month+"-"+date;
}

var usrdate=new Date();
usrdate.setFullYear(2014,4,13);
usrdate=usrdate.format();

function compare(usrdate)
{
    var sysdate=new Date().format();
    if(sysdate>usrdate)
       alert("System Date is greater");
    else if(sysdate<usrdate)
       alert("User Date is greater");
    else
       alert("Both date is equal");
}

</script>
</head>
<body>
<p onclick="compare(usrdate);">Compare Date </p> 
</body>
</html>

String date to System date compare

3 Answers3