JSFiddle - React, Tailwind, and code Playground

HTML

<div id="spinner"></div>

CSS

#spinner {
    width: 30px;
    height: 30px;
    background-color: gray;
    -webkit-animation: spin 2s infinite linear;
    animation: spin 2s infinite linear;
}

@-webkit-keyframes spin {
    0%   { -webkit-transform: rotate(0); }
    100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin {
    0%   { transform: rotate(0); }
    100% { transform: rotate(360deg); }
}