JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li class="left">Left</li>
    <li class="left">Left</li>
    <li class="left">Left</li>
    <li class="left">Left</li>
    <li class="left">Left</li>
    <li class="right">Right</li>
    <li class="right">Right</li>
    <li class="right">Right</li>
    <li class="right">Right</li>
    <li class="right">Right</li>
</ul>

CSS

ul {
    -webkit-columns: 2;
    -moz-columns: 2;
    columns: 2;
}