JSFiddle - React, Tailwind, and code Playground

HTML

<div id="outer">
    <div id="inner"></div>
</div>

CSS

#outer
{
    width:300px;
     height;auto;
    border:1px solid black;
    overflow:auto;
}
#inner
{
    width:200px;
    height:300px;
    border:1px solid black;
}