JSFiddle - React, Tailwind, and code Playground

HTML

<div id="div1"><div style="width:1000px;"></div><div id="div2"><div>2</div></div></div>

CSS

#div1{
    height:350px;
    position:relative;
    background:#009;
    width:300px;
    overflow-x: scroll;
}
#div2{
    height:400px;
    width:200px;
    position: sticky;
    top:0;
    left:0;
    background:#090;
}