JSFiddle - React, Tailwind, and code Playground

HTML

<div id='container' style='width:600px; border:1px solid black;'>
    <textarea style='border-style:none none dashed none; border-color:black; width:100%; display:block;box-sizing:border-box;border-width:1px; margin-bottom:1px;'></textarea>
    <div style='width:100%; box-sizing:border-box; height:35px;padding:5px;'>
        <button style='float:right'>Lama mama
        </button>
    </div>
</div>