<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/daterangepicker/daterangepicker.css" /> <script type="text/javascript" src="https://cdn.jsdelivr.net/jquery/latest/jquery.min.js"></script> <script type="text/javascript" src="https://cdn.jsdelivr.net/momentjs/latest/moment.min.js"></script> <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/daterangepicker/daterangepicker.min.js"></script> <input type="text" name="birthday" value="10/24/1984 w" />

$(function() { $('input[name="birthday"]').daterangepicker({ singleDatePicker: true, showDropdowns: true, minYear: 1901, maxYear: parseInt(moment().format('YYYY'),10) }, function(start, end, label) { var years = moment().diff(start, 'years'); alert("You are " + years + " years old!"); }); });