JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li class="foo">foo</li>
    <li class="bar">bar</li>
    <li class="foo bar">foo bar</li>
    <li class="foo bar piyo">foo bar piyo</li>
    <li class="bar piyo foo">bar hoge foo</li>
</ul>

CSS

.hoge{color:red;}

JavaScript

$('.foo').addClass('hoge');