JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<col>
<tr><td>x <div></div></td></tr>
</table>

CSS

col { background: yellow; opacity: 0.5;}
tr { background: white; opacity: 0.5; position: relative; }
div {width: 100px; height: 100px; background: blue; top: 0; right: 0; position: absolute;}