JSFiddle - React, Tailwind, and code Playground

HTML

<table cellpadding="0" cellspacing="0" width="200">
    <tr>
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
    <tr>
        <td>1</td>
        <td>2</td>
        <td>3</td>
    </tr>
</table>

CSS

tr {
    border-bottom: 1px solid #000;   
}