JSFiddle - React, Tailwind, and code Playground

HTML

<div id="abc" class="xyz fun">
    Sample Div
</div>

CSS

#abc {
    background-color: pink;
}

#ABC {
    font-weight: bold;
}

.xyz {
    text-decoration: underline;
}

.XYZ {
    font-size: 2em;
}

div {
    margin: 5px;
}

DIV {
    position: absolute;
    top: 10px;
    left: 20px;
    right: 20px;
    bottom: 5px;
}