JSFiddle - React, Tailwind, and code Playground

HTML

Scroll using the result scrollbar
<br/>
<br/><span></span>

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CSS

body {
    padding: 20px;
}
div {
    width: 80%;
    height: 400px;
    overflow: scroll;
    position: fixed;
    border: 1px solid cyan;
    padding: 0px;
}
span {
    position: fixed;
    background: white;
    display: block;
    top: 34px;
}

JavaScript

$(document).scroll(function () {
    var scrollTop = $(window).scrollTop();
    var docHeight = $(document).height();
    var winHeight = $(window).height();
    var scrollPercent = scrollTop / (docHeight - winHeight);
    var divHeight = $("div").height();
    var divContentHeight = $('div')[0].scrollHeight;
    var equation = scrollPercent * (divContentHeight - divHeight);
    $('div').scrollTop(equation);
});