JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    Test test test. 1.2.3.
</div>

CSS

div {
    height: 200px;
    border: 1px solid green;
}
div:before {
    content: 'before content';
    display: block;
    height: 40px;
    width: 400px;
    border-bottom: 1px solid black;
    -ms-filter: 'progid:DXImageTransform.Microsoft.gradient( startColorstr="#8066aaaa", endColorstr="#0066aaaa",GradientType=0 )';
}