JSFiddle - React, Tailwind, and code Playground

HTML

<table style="height:250px;">
    <tr>
        <td style="height:100%;">
        </td>
    </tr>
    <tr>
        <td>
            <textarea style="height:100px;" name="test"></textarea>
        </td>
    </tr>
</table>

JavaScript

alert($('table').outerHeight(true));