JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>Item one
        <ul>
            <li>Item two with a long width to accomodate text</li>
        </ul>
    </li>
</ul>

CSS

ul li{
    position:relative;
    background-color: #ccc;
    float:left;
}

ul li ul
{
    position:absolute;
    top:30px;
    left:10px;
}

ul li ul li{width:200px;}