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Hi I need to set this cookie for a month

I just need this feature to expire after a month, can anyone tell me how to do this?

function _saveUserPreference() {
  // Set the cookie expiry to one year after today.
  var expiryDate = new Date();
  expiryDate.setFullYear(expiryDate.getFullYear() + 1);
  document.cookie = cookieName + '=y; expires=' + expiryDate.toGMTString();
}
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2 answers


You need to add one month to expiryDate

var:



  var expiryDate = new Date();
  expiryDate.setMonth(expiryDate.getMonth() + 1);
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    function _saveUserPreference(){
        var montharr = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
            expiryDate = new Date(),
            year = expiryDate.getFullYear(),
            month = expiryDate.getMonth(),
            date = expiryDate.getDate();

        var newMonth, newYear;

        expiryDate.setMonth(month+1);

        newMonth = expiryDate.getMonth();

        newYear = expiryDate.getFullYear();
        // when expiryDate is 2014-01-31, setMonth(m+1),then expiryDate is 2014-03-03 or 2014-03-02
        if(newMonth - month > 1 ){

            if( isLeapYear(year) && newMonth === 2 ){
                expiryDate.setDate(29);
                expiryDate.setMonth(1);
            }else{
                expiryDate.setDate(montharr[newMonth-1]);
                expiryDate.setMonth(newMonth-1);
            }
        }

        document.cookie = cookieName + '=y; expires=' + expiryDate.toGMTString();

        // if you mean a month to 30 days

        /*var now = new Date(),
            milliSeconds = now - 0 + 30 * 24 * 3600 * 1000,
            expiryDate = new Date(milliSeconds);

        document.cookie = cookieName + '=y; expires=' + expiryDate.toGMTString();*/

    }

    function isLeapYear(year){

        if( year%4 === 0 && year%100 !== 0 ){
            return true;
        }

        if( year%100 === 0 && year%400 === 0 ){
            return true;
        }

        return false;
    }


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