JSFiddle - React, Tailwind, and code Playground

HTML

<div class="drag">
    <p>Exemple bloc</p>
</div>
<div class="drag">
    <p>Exemple bloc</p>
</div>


<div id="drop">
   <p>Drop here</p>
</div>

CSS

.drag {
    height: 150px;
    width: 150px;
    background: #505050;
    color: #FFFFFF;
    padding: 10px;
    display: inline-block;
    margin: 0 10px 10px 10px;
}

#drop {
    width: 100%;
    height: 600px;
    background: #FFFFFF;
    border: 1px solid #999999;
}

JavaScript

$(".drag").draggable({
    opacity: 0.7,
    snap: '#drop',
    cursor: "move",
    revert: "invalid",
    //helper: "clone"
});

$("#drop").droppable({
    drop: function(event, ui) {
        
    }
});