JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
<div class="inner">
</div>
</div>

CSS

::-webkit-scrollbar {
                    height:8px;
                    width: 8px;
                    background: #DAD2D2;}
::-webkit-scrollbar-thumb {
                    background-color: #000;
    border-radius: 10px;}
body{padding:20px;}
.container{
    margin:0 auto;
    display:block;
    background:#aaa;
    width:400px;
    height:500px;
    overflow:scroll}
.inner{
    width:500px;
    height:600px;
    display:block;
    background:#eee;
}