JSFiddle - React, Tailwind, and code Playground

HTML

<div id="dlg">
        <asp:UpdatePanel ID="upNewUpdatePanel" runat="server">
            <ContentTemplate>
                <asp:Label ID="updateLabel" runat="server"></asp:Label>
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>

JavaScript

$("#dlg").dialog({
            autoOpen: false,
            bgiframe: true,
            width: 500,
            modal: true,
            closable: true,
            buttons: {
                Close: function () {
                    $(this).dialog('close');
                }
            }
        });
        $("#dlg").parent().appendTo($("form:first"));

        function openDialog() {
            $('#dlg').dialog('open')
            return false;
        }