JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>one</td>
        <td>two</td>
        <td>two</td>
    </tr>
    <tr>
        <td>one</td>
        <td>two</td>
        <td>two</td>
    </tr>
    <tr>
        <td>one</td>
        <td>two</td>
        <td>two</td>
    </tr>
    <tr>
        <td>two</td>
        <td>two</td>
        <td>two</td>
    </tr>
</table>

JavaScript

$('table tr:not(:last-child)').css("border-bottom", "1px silver solid");