JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
<table class='testCls'>
    <tr>
        <td>
        <input name="blabla" type="hidden" value="pouet" />
        </td>
    </tr>
</table>

JavaScript

alert ("test: " + $(".testCls [name='blabla']").val());