JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>foo</td>
        <td>foo</td>
        <td>foo</td>
    </tr>
    <tr>
        <td>foo</td>
        <td>foo</td>
        <td>foo</td>
    </tr>
</table>

CSS

table tr {
    border-bottom:1px solid black;
}