JSFiddle - React, Tailwind, and code Playground

HTML

<div class="droppable">
  <div class="except_this_div"></div>
</div>
<div class="draggable">

CSS

.droppable {
  width: 150px;
  height: 150px;
  border: 1px solid;
}

.except_this_div {
  width: 80px;
  height: 80px;
  margin: auto;
  background: dodgerblue;
}

.draggable {
  width: 50px;
  height: 50px;
  margin: auto;
  background: hotpink;
}

JavaScript

$('.droppable').droppable();
$('.except_this_div').droppable({
  accept: function() {
    return false; // for testing.
  },
  greedy: true
});
$('.draggable').draggable({
  revert: 'invalid'
});