JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/themes/smoothness/jquery-ui.css">
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
<input type="text" id="start" name="start">

JavaScript

$(function(){
    $("#start").datepicker({
        dateFormat: 'yy-mm-dd',
        onSelect: function(dateText,inst){
            alert(dateText);
            //Her skal du sĂĄ lave din ajax kald:
            $.post("dataexchange", {start: dateText}, function( data ) {
                alert("SVAR FRA AJAX");
            });
        }
    });
});