JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <div class="left">Content</div>
    <div class="right">Sticky</div>
</div>

CSS

.wrapper {
    overflow: visible;
    display: table;
    width:400px;
}

.left {
    float: left;
    width:60%;
    height:1280px;
    background-color:#EEE;
}

.right {
    overflow: hidden;
    position: -webkit-sticky;
    position: sticky;
    top: 0;
}