JSFiddle - React, Tailwind, and code Playground

HTML

<div class="select-all-these">1</div>
<div class="select-all-these except-these">2</div>
<div class="select-all-these except-these">3</div>
<div class="select-all-these">4</div>
<div class="select-all-these except-these">5</div>
<div class="select-all-these">6</div>

JavaScript

$('.select-all-these:not(.except-these):nth-child(6)').text('nth-child counts all elements (1 based!)');
$('.select-all-these:not(.except-these):eq(1)').text('eq counts only matching elements (0 based!)');