JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="floater">hi</div>
    <div style="clear:both;"></div>
</div>

CSS

#container{
    min-height:5px;
    width:500px;
    background:red;
}

#floater{
    height:200px;
    width:100px;
    background:blue;
    float:right;
}