JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="bad-drifting">
    <li>text</li>
</ul>

JavaScript

jQuery(document).ready(function() {	
    if (jQuery('#bad-drifting li:has(em)')) { // .has('em')
        jQuery('#bad-drifting').css({'color': 'red'});
        jQuery('#bad-drifting').css({'font-weight': 'bold'});
	}
});