JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrapper">
    <div id="top">
    </div>
    <div id="left">
    </div>
</div>

CSS

#wrapper {
    width: 300px;
    height:300px;  
    overflow: scroll;    
}
#left {
    width: 50px;
    height: 500px;
    background-color: #FFC;
}
#top {
    width: 500px;
    height: 50px;
    background-color: #FCF;     
}