JSFiddle - React, Tailwind, and code Playground

HTML

<div id="testDiv"></div>
<span id="spnTop">Top</span>

CSS

#testDiv
{
    height:600px;
    width:400px;
    background:#c0c0c0;
}

JavaScript

$('#spnTop').on("click",function(){
$('html,body').animate({ scrollTop: 0 }, 'slow', function () {
                      alert("reached top");
                    });
});