JSFiddle - React, Tailwind, and code Playground

HTML

<code>:focus</code> = Red
<br/><br/>
<button type="button">Button</button>
<br/><br/>
<a href="#">Anchor</a>

CSS

a:focus, button:focus {
    background-color: red;
}
a:active, button:active {
    background-color: yellow;
}