JSFiddle - React, Tailwind, and code Playground

by djquery

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.5/themes/ui-darkness/jquery-ui.css">
<div class="selector" title="No close button">This is a test without a close button</div>

CSS

.no-close .ui-dialog-titlebar-close {display: none }

JavaScript

$( ".selector" ).dialog({ dialogClass: 'no-close' });