JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <ul>
        <li>Test</li>
        <li>Test</li>
        <li>Test</li>
        <li>Test</li>
        <li>Test</li>
        <li>Test</li>
    </ul>
</div>

CSS

#container {
    width: 500px;
    height: 50px;
    overflow: hidden;
    background-color: green;
    position: relative;
}

#container ul {
    position: fixed;
    top: 10px;
    left: 20px;
    overflow: visible;
}