How to check condition for date greater than or smaller than in javascript?

Question

here inputtext gives the value entered in the textbox and hidden field value returns current value.

My code till now:

if (inputText.value.length != 0) {
    if (inputText.value < document.getElementById('<%=HdnDate.ClientID%>').value) {
        alert("Please ensure that the Date is greater than or equal to the Current Date.");
        inputText.value = "";
        return false;
    }
}

Answer 1

Try This:

<script type="text/javascript">
    var dateObj = new Date();
    var month = dateObj.getUTCMonth();
    var day = dateObj.getUTCDate();
    var year = dateObj.getUTCFullYear();
    var dateSplitArray = "";
    var enddate = '05/05/2014'; // set your date here from txtbox
    var IsValidDate = false;
    splitString(enddate, "/");
    if (year >= dateSplitArray[2]) {
        if (month >= dateSplitArray[1]) {
            if (day >= dateSplitArray[0]) {
                IsValidDate = true;
            }
        }
    }
    if (IsValidDate == false) {
        alert("Please ensure that the Date is greater than or equal to the Current Date.");
    }
    else {
        alert("Please proceed, no issue with date");
    }
    function splitString(stringToSplit, separator) {
        dateSplitArray = stringToSplit.split(separator);
    }
</script>

Answer 2

Assuming that the input date is in a format like d/m/y, then you can convert that to a date object using:

function parseDate(s) {
  var b = s.split(/\D+/g);
  return new Date(b[2], --b[1], b[0]);
}

which creates a date object for 00:00:00 on the specified date.

To compare to the current date, create a new Date object and set the time to 00:00:00.0:

var today = new Date();
today.setHours(0,0,0,0);

Then convert the string to a Date and compare the two:

var otherDay = parseDate('21/4/2013');

console.log(otherDay + ' less than ' + today + '?' + (otherDay < today)); // ... true

Edit

It seems your date format is 4-may-2014. In that case:

function parseDate(s) {
  var months = {jan:0,feb:1,mar:2,apr:3,may:4,jun:5,
                jul:6,aug:7,sep:8,oct:9,nov:10,dec:12};
  var b = s.split(/-/g);
  return new Date(b[2], months[b[1].substr(0,3).toLowerCase()], b[0]);
}

Answer 3

Try This

var date1=inputText.value;
var date2=document.getElementById('<%=HdnDate.ClientID%>').value;
var record1 = new Date(date1);
var record2 = new Date(date2);
if(record1 <= record2)
{
      alert("Please ensure that the Date is greater than or equal to the Current Date.");

}

Answer 4

Try this code :

var d1= new Date(); // get the current date

var enddate = inputText.value; // text box value

var d2 = enddate.split('/');

d2 = new Date(d2.pop(), d2.pop() - 1, d2.pop());


if (d2 >= d1)
 {
    // do something
 }