JSFiddle - React, Tailwind, and code Playground

HTML

<span class="lefted">Drop here</span>


<div class="what_to_drop">Drag me to Drop</div>

CSS

.lefted {
    float: left;    
}

.what_to_drop {
    clear: left;
}

.drop_over {
    background-color: red;
}

JavaScript

$('.what_to_drop').draggable();

$('.lefted').droppable({
    hoverClass        : 'drop_over',
});