JSFiddle - React, Tailwind, and code Playground

HTML

<table><tbody><tr><td><span></span></td></tr></tbody></table>

CSS

* {
    border: solid 1px;
}
table{
    position: relative;
    width:500px;
    height:50px;
}
td {
    position:relative;
    width:50%;
}
span {
    position:absolute;
    right:0;
    display:block;
    background:#333;
    width:20px;
    height:20px;
}