JSFiddle - React, Tailwind, and code Playground

HTML

<div id="documents_joints" class="menu">
  <a href="">
    <img src="" alt="1">
  </a>
  <a href="">
    <img src="" alt="2">
  </a>
  <a href="">
    <img src="" alt="3">
  </a>
</div>

CSS

#documents_joints.menu a:nth-of-type(2) img {
  border:2px solid red;
}