JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="button"><i class="fa fa-spinner fa-spin"></i></div>

CSS

.button {
  background: #689F38;
  height: 43px;
  width: 240px;
  border-radius: 3px;
}

.button > i {
  margin-top: 11px;
  width: 100%;
  text-align: center;
  font-size: 20px;
  color: #FFF;
}