JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>col 1</td>
        <td>col 2</td>
        <td>col 3</td>
        <td>col 4</td>
        <td>col 5</td>
    </tr>
    <tr>
        <td>col 1</td>
        <td>col 2</td>
        <td>col 3</td>
        <td>col 4</td>
        <td>col 5</td>
    </tr>
</table>

JavaScript

$('table td').click(function () {
    if ($(this).index() == 4) {
        alert('you clicked the last column');
    }
});