JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/ui-lightness/jquery-ui.css">
<table>
    <tbody>
        <tr><td>first row</td></tr>
        <tr><td>second row</td></tr>
        <tr><td>third row</td></tr>
        <tr><td>fourth row</td></tr>
        <tr><td>fifth row</td></tr>
    </tbody>
</table>

JavaScript

$('table tr').click(function() {

    alert( this.rowIndex );  

});