JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
<link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.4/themes/smoothness/jquery-ui.css">
    <button class="site-config-button">Настройки сайта</button>
    <form class="site-config-form" method="post" title="Настройки сайта">
      Число: <input name="period" value="5" />
    </form>

JavaScript

$('button.site-config-button').click(function() {
    $('form.site-config-form').dialog();
  });