JSFiddle - React, Tailwind, and code Playground
jQuery scrollTop
HTML
<div class="biggum"></div>
<a href="#top">To da top</a>
CSS
body { margin:3%; }
.biggum { min-height: 1000px; }
JavaScript
$("a[href='#top']").click(function() {
$("html, body").animate({ scrollTop: 0 }, "slow");
return false;
});