JSFiddle - React, Tailwind, and code Playground

HTML

<button>button</button>
<ul>
  <li>1</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
  <li>5</li>
  <li>6</li>
  <li>7</li>
  <li>8</li>
  <li>9</li>
  <li>10</li>
</ul>

JavaScript

$('li:nth-child(n5)').hide();
$('button').on('click', function(){
	$('li:nth-child(n5)').toggle();
});