JSFiddle - React, Tailwind, and code Playground
HTML
<a href="http://iavi.com">Test</a>
<a href="http://iavi.com"><img src="https://www.google.com/logos/classicplus.png"></a>CSS
a[href^="http"]:after { content:""; width:10px; height:10px; display:inline-block; background-color:red; }
a[href^="http"] img ~ :after { display:none; }