JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li class="foo">Baz</li>
    <li>Select Me!</li>
    <li>Select Me!</li>
    <li>Select Me!</li>
    <li class="bar">Baz</li>
    <li>Don't Select Me</li>
    <li>Red Herring List Item</li>
</ul>

JavaScript

$('li.foo').nextUntil('li.bar').css('background', '#F00');