CODEWITHSUNDEEP
javascriptjquerydate
RAJA.P.N
RAJA.P.N

Reputation: 106

Get new age on a particular date through jQuery/ javascript

I have a scenario that the page displays user's age (30) at particular date (example, 09/10/2015). Now on selection of new date, I have to pre-populate new age field with the business logic of when the new date is greater than 6 months/ 182 days (example 03/11/2016) from the given date, then age should be +1 (example age would be 31).

I know we can achieve this by following code. But I am looking for an optimal way of getting new age on selection of new date.

var newDate = $("#NewDate").val();
if (newDate != null && newDate != '') {
    var currDCD = new Date($("#CurrentDate").val());
    var newDCD = new Date(newDate);
    var yearsDiff = newDCD.getFullYear() - currDCD.getFullYear();
    var day = 1000 * 60 * 60 * 24;
    //Get last years days difference
    var daysDiff = Math.floor((newDCD.setFullYear(currDCD.getFullYear() + (yearsDiff - 1)) - currDCD) / day);
    var currAge = parseInt($("#CurrentAge").val());

    //Set new owner age
    $("#NewAge").val(currAge + (daysDiff > 182 ? yearsDiff : yearsDiff-1));
}

Upvotes: 1

Views: 134

Answers (2)

RAJA.P.N
RAJA.P.N

Reputation: 106

Updated and working code. Thanks Danilo.

var newDate = $("#NewDate").val();
if (newDate != null && newDate != '') {
    var currDCD = new Date($("#CurrentDate").val());
    var newDCD = new Date(newDate);
    var diff = new Date(newDCD - currDCD);
    var ageDiff = diff.getFullYear() - 1970 + (diff.getMonth() >= 6 ? 1 : 0);
    var currAge = parseInt($("#CurrentOwnerAge").val());
    $("#NewAge").val(currAge + ageDiff);

Upvotes: 0

Danilo
Danilo

Reputation: 2686

Something like this should give you the age rounded down or up depending on the month:

function getAge(birthday) {
    var diff = new Date(new Date() - new Date(birthday))
    return diff.getFullYear() - 1970 + (diff.getMonth()>=6?1:0)
}

where birthday is anything that can be used in the constructors of Date

Upvotes: 1

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