JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wardopeskab"><ul></ul></div>

CSS

.wardopeskab ul {
   list-type: disc;
}

JavaScript

jQuery(function($){
    
    $('.wardopeskab ul')
        .prepend(
            new Array(11).join('<li class="underbukser">underbukser</li>') +
            new Array(11).join('<li class="t-shirt">t-shirt</li>')
        );
});