JSFiddle - React, Tailwind, and code Playground

by André Albson

HTML

<select id="myselect">
<option value="1"> first </option>
<option value="2"> second </option>
<option value="3"> third </option>
</select>

<select id="second">
</select>
<br>
<input type='button' value="click to clone"  id="cloneBtn"/>

JavaScript

$('#cloneBtn').click(function() {
    var $options = $("#myselect > option").clone();
    $('#second').append($options);
});