JSFiddle - React, Tailwind, and code Playground

HTML

<table id='test' border='1'>
    <tr>
        <td>
            <select name='theSelect[]'>
                <option value='1'>1</option>
                <option value='2'>2</option>
                <option value='3'>3</option>
            </select>
        </td>
    </tr>
    <tr>
        <td>
            <select name='theSelect[]'>
                <option value='1'>1</option>
                <option value='2'>2</option>
                <option value='3'>3</option>
            </select>
        </td>
    </tr>
</table><br/><br/>

<input type='button' id='copy' value='CLICK ME!'/><br/><br/>

<div id='target'></div>

JavaScript

$('#copy').click(function() {
    $('#test').clone().prependTo('#target');
});