JSFiddle - React, Tailwind, and code Playground

HTML

<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() {
    $('.site-config-form').toggle(); //.dialog('open');
  });