JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td style="border:1px solid red">
            <textarea class="expand" rows="1">test</textarea>
        </td>
    </tr>
</table>

JavaScript

var rows = $('.expand').attr('rows');
    var rowsNew = parseInt(rows) + 1;
    $('.expand').attr('rows',rowsNew);
    $('.expand').html(rowsNew);