JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <col style="visibility: collapse;"/>
    <tbody>
        <tr>
            <td>invisible</td>
        </tr>
    </tbody>
</table>

CSS

td {
    border:1px solid red;
    padding: 2px 5px;
}

JavaScript

console.log($("table").find("td:visible").length);
console.log($("table").find("col:visible").length);