JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
    <ul>
        <li>
            <a>
                Text
            </a>
            <div class="sub">
                Sub
            </div>
        </li>
    </ul>
</div>

CSS

ul { display: table; }
li { display: table-cell; width: 300px; background: #ddd; padding-left: 50px; position: relative; }
.sub { position: absolute;  left: 0; }