JSFiddle - React, Tailwind, and code Playground
by WK_of_Angmar
HTML
<li>
<p>This should stay.</p>
</li>
<li id="shareMenu">
<p>This should be hidden.</p>
<a class="shareButton"></a>
</li>
<li>
<p>This should stay.</p>
</li>
CSS
LI#shareMenu > A.shareButton
JavaScript
document.querySelector("LI#shareMenu > A.shareButton").parentNode.style.display = "none";