JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>Item 1</li>
    <li>Item 2</li>
    <li>Item 3</li>
</ul>

CSS

* {
    margin: 0;
    padding: 0;
}

body {
    padding: 10px;
}

ul {
    list-style-type: none;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: row;
    flex-direction: row;
}

ul > li {
    -webkit-flex: 1 1 33%;
    flex: 1 1 33%;
    outline: 1px dotted #000;
    white-space: nowrap;
}