JSFiddle - React, Tailwind, and code Playground

HTML

<div id="one">
    <div id="two"></div>
</div>

CSS

#one {
    border:2px solid #ddd;
    width:150px;
    height:30px;
}
#two {
    border:2px solid #ddd;
    width:150px;
    height:30px;
    margin-left:150px;
    margin-top:-2px;
}