JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">
    <ul>
        <li>Hello</li>
         <li>World</li>
    </ul>    
</div>

CSS

.box{
    border-bottom: 1px solid blue;
    overflow: hidden;   
}

ul{
    list-style: none;
    margin: 0;
    padding: 0;
}

ul li{
    float: left;
    background: green;
    border: 1px solid red;
}