JSFiddle - React, Tailwind, and code Playground

HTML

<style>
#main {background-color: red; width: 70%;}
#right_al{float: right;}
#to_scroll{overflow: scroll;}
</style>

<div id='main'>
    <div id='right_al'>
        CONTENT#foo
        <div id='to_scroll'>
        ZZZ<br />ZZZ<br />ZZZ<br />ZZZ<br />ZZZ<br />
        ZZZ<br />ZZZ<br />ZZZ<br />
        </div>
    </div>
    <div id='div1'>CONTENT #1</div>
    <div id='div2'>CONTENT #2</div>
    <div id='div3'>CONTENT #3</div>
    <div id='div4'>CONTENT #4</div>
    <div id='div5'>CONTENT #5</div>
</div>