JSFiddle - React, Tailwind, and code Playground

HTML

<div class="out">
<div  class="in"></div>
</div>

CSS

.out {
    background:#00FFFF;
    width:100px;
    height:100px;
    overflow: auto;
}
.in {
    background:#FF0000;
    width:200px;
    height:200px
}