JSFiddle - React, Tailwind, and code Playground

HTML

<div class="hui"></div>
 <div class="zalupa"></div>

CSS

.hui{
    width:100px;
    height:100px;
    background:green;
}
.zalupa{
    width:50px;
    height:50px;
    background:red;
    display:none;
}
.display-zalupa {
    display:block;
}

JavaScript

$(document).ready(function() {
    $(document).on('click','.hui',function(e){
        e.stopPropagation();
        $('.zalupa').toggle()    
   } )     
})