JSFiddle - React, Tailwind, and code Playground

HTML

<div id="editorRows">
    <div class="deleteRow">
 <div class="formInput">
    <input type="text" id="beginDate" class="dpicker">
 </div>

    <div class="formInput">
        <input type="id" id="endDate" class="dpicker">
    </div>
<a href="#" id="addItem">add</a>
     </div>
</div>

JavaScript

$('body').on('focus', ".dpicker", function () {
    $(this).datepicker();
});

 $("#addItem").click(function () {
        $.ajax({
            url: this.href,
            cache: false,
            success: function (html) {
                $("#editorRows").append(str);
            }
        });
        return false;
    });

    $(document).on('click', 'a.deleteRow', function () {
        $(this).closest("div").remove();
        return false;
    });

var str = '<div class="deleteRow">' +
'<div class="formInput">' +
   ' <input type="text" id="" class="dpicker">' +
'</div>' +

    '<div class="formInput">' +
     '   <input type="id" id="" class="dpicker">' +
    '</div> ' +
'<a href="#" id="addItem">add</a>' +
'</div>';

$(function () {
    $("#beginDate").datepicker({
        minDate: 1,
        changeMonth: true,
        dateFormat: 'mm/dd/yy',
        onClose: function (selectedDate, instance) {
            if (selectedDate != '') {
                $("#endDate").datepicker("option", "minDate", selectedDate);
                var date = $.datepicker.parseDate(instance.settings.dateFormat, selectedDate, instance.settings);
                date.setMonth(date.getMonth() + 3);
                var minDate2 = new Date(selectedDate);
                minDate2.setDate(minDate2.getDate() + 1);

                $("#endDate").datepicker("option", "minDate", minDate2);
                $("#endDate").datepicker("option", "maxDate", date);
            }
        }
    });
    $("#endDate").datepicker({
        minDate: 1,
        changeMonth: true,
        dateFormat: 'mm/dd/yy',
        onClose: function (selectedDate) {
            $("#beginDate").datepicker("option", "maxDate", selectedDate);
        }
    });
});