JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>Item 1</li>
    <li>Item 2</li>
    <li></li>
    <li>Item 4</li>
    <li>Item 5</li>
    <li></li>
</ul>

CSS

li:empty { list-style-type: circle; background: red; }