JSFiddle - React, Tailwind, and code Playground

HTML

<div class="tab"></div>
<div class="tab"></div><div class="tab"></div>
<div class="tab"></div>

CSS

.tab {
    float: left;
    width:25%;
    height:25px;
    background:black;
    border:1px solid #fff;
    box-sizing: border-box;
}