jquery-ui.css

Firstly, thank you for this awesome plugin.

The question is, what is the jquery-ui.css doing, and if I am using this plugin from the html on a custom page with:

<?php echo do_shortcode(‘[THE SHORTCODE]’); ?>

then do I need to include this css on the pages styles, or does it operate some other way. I ask because the menu seems to work fine if I just call shortcode-menu.css on the page, and not jquery-ui.css additionally. But I will do both if it is necessary.

Thank you!

https://wordpress.org/plugins/shortcode-menu/