JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
</ul>

CSS

ul {
    text-align: justify;    
     padding: 0;
    margin: 0;
    list-style-type: none;
}
ul:after {
    display: inline-block;
    width: 100%;
    content: "";
}
li {
    display: inline-block;    
    width: 50px;
    height: 50px;
    background: blue;
}