JSFiddle - React, Tailwind, and code Playground
HTML
<ul>
<li class="list-group-item">Cras justo odio</li>
<li class="list-group-item">Dapibus ac facilisis in</li>
<li class="list-group-item">Morbi leo risus</li>
</ul>
JavaScript
document.body.addEventListener('click', function(e) {
if( e.target.classList.contains('list-group-item'))
e.target.style.backgroundColor = 'red';
});