JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://raw.github.com/LeaVerou/prefixfree/gh-pages/prefixfree.min.js"></script>
<div></div>

CSS

@keyframes move {
  100% {
    top: 100px;
  }
}

div {
  width: 100px;
  height: 100px;
  background: red;
  position: absolute;
  left: 20px;
  top: 20px;
  animation: move 2s;
}