JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <aside id="ad1"> <a href="http://www.cnn.com/" target="_blank">
            <img border="0" src="https://www.google.com/logos/doodles/2014/world-cup-2014-13-5379502658027520.9-hp.gif"width="100%" alt="cnnnewsgif"/></a>

    </aside>
</body>

CSS

img, img:hover {
    text-decoration: underline;
}