JSFiddle - React, Tailwind, and code Playground

by Qwerty_Wasd

HTML

<ul>
<li>1</li>
<li>2</li>
<li class="activeRed">3</li>
<li>4</li>
</ul>

CSS

.activeRed{
	color:red;
}

JavaScript

let collection = document.querySelector('.activeRed').parentElement.children;
for (e of collection) {
  if (e !== collection[collection.length - 1]) e.classList.add('activeRed');
}