JSFiddle - React, Tailwind, and code Playground

HTML

<div class="table-responsive">
    <table class="table table-hover">
        <tr>
            <td><button class="btn btn-success">ADD</button></td>
            <td><span id="addText"><strong>Add this text to textarea.</strong></span></td>
        </tr>
    </table>
</div>
<br>
<div class="form-group">
    <textarea type="text" id="reviewText" placeholder="See Text Here." class="form-control"></textarea>
</div>

JavaScript

$(function () {
     $('button').click(function () {
         $('#reviewText').val($(this).closest('td').next().text());
     });
 });