JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/themes/base/jquery-ui.css">

JavaScript

var dlg = $('\
  <div>\
    <form action=/dummy>\
      <p><input name=username type=text></p>\
      <p><input name=password type=password></p>\
      <p><input type=submit value="Log in"></p>\
    </form>\
  </div>\
');

dlg.dialog({
    closeText: 'cancel',
    hide: 'fade',
    modal: true,
    close: function()
    {
        dlg.remove();
    }
});