JSFiddle - React, Tailwind, and code Playground

by Sergei Sokolov

HTML

<ul class="list">
    <li class="item">item 1</li>
    <li class="item">item 2</li>
    <li class="item">item 3</li>
    <li class="item">item 4</li>
    <li class="item">item 5</li>
</ul>

JavaScript

/**
 * для вопроса https://toster.ru/q/557675
 */
var myNodeList = document.querySelectorAll('ul.list li');
if( myNodeList.length) {
  var el0 = myNodeList[0]; // первый 
  el0.innerText += " - первый!";
}