JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>
        <label><input type="radio" name="radio-group" checked="checked" value="1"> One</label>
        <label><input type="radio" name="radio-group"value="2"> Two</label>
    </li>
</ul>

JavaScript

var clone, list;
list = $( 'ul' );
for(var i=0; i<6; i++) {
    clone = list.find( 'li:last' ).clone();
    clone.appendTo( list );
}