JSFiddle - React, Tailwind, and code Playground
by ZachWills
HTML
<div class="plus">+</div>
CSS
.plus {
border-radius:100%;
width:40px;
height:40px;
line-height:35px;
font-size:32px;
color:white;
text-align:center;
background:#333;
margin:auto;
margin-top:100px;
}