JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
                <li> test A </li>
                <li> test B </li>
                <li> test C </li>
           </ul>

CSS

ul { list-style-image: url("http://cdn.sstatic.net/stackoverflow/img/favicon.ico") }

.highlight { background: #F00; }

JavaScript

$("ul").each(function(){
    if($(this).css("listStyleImage") != "") {
        $(this).addClass("highlight");
    }
});