Get exact age from datepicker?

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@lisamthorpe OK, you need to adjust your function to something like this:

function getAge(dateString, programDate) {
    var birthDate = new Date(dateString);
    var age = programDate.getFullYear() - birthDate.getFullYear();
    var m = programDate.getMonth() - birthDate.getMonth();
    if (m < 0 || (m === 0  &&  programDate.getDate() < birthDate.getDate())) {
         age--;
     }
    return age;
}

Disclaimer: I haven’t test this, but that’s the general idea.