JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="longcontent">something long</div>
</div>

CSS

.wrapper {
    position: relative;
    width: 200px;
    height: 100px;
    outline: 1px solid lime;
    overflow: auto;
}

.longcontent {
    position: absolute;
    width: 3000px;
    height: 100px;
}