JSFiddle - React, Tailwind, and code Playground

HTML

<table border="1" class="click-table">
    <tbody>
        <tr>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr>
            <td>4</td>
            <td>5</td>
            <td>6</td>
        </tr>
        <tr>
            <td>7</td>
            <td>8</td>
            <td>9</td>
        </tr>
        <tr>
            <td>10</td>
            <td>11</td>
            <td>12</td>
        </tr>
        <tr>
            <td>13</td>
            <td>14</td>
            <td>15</td>
        </tr>
        <tr>
            <td>16</td>
            <td>17</td>
            <td>18</td>
        </tr>
    </tbody>
</table>

JavaScript

$(function() {
    $('.click-table td').on('click', function() {
        alert( $(this).parent('tr').index() );
    });
});