JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tbody>
        <tr>
            <td>
                This is some content.
            </td>
        </tr>
        <tr>
            <td>
                Second row content.
            </td>
        </tr>
    </tbody>
</table>

CSS

tr {
  box-shadow: inset 0 -0.125rem red;
}