JSFiddle - React, Tailwind, and code Playground
by slym12
HTML
<button>+</button>
CSS
button {
padding: .3em .5em;
border: 10px solid transparent;
border-radius: 50%;
background: #58a;
background-clip: padding-box;
box-shadow: 0 0 0 1px rgba(0,0,0,.3) inset;
color: white;
font: bold 150%/1 sans-serif;
cursor: pointer;
line-height: 0;
}