JSFiddle - React, Tailwind, and code Playground

by James Hooper

HTML

<script src="https://unpkg.com/[email protected]/dist/interact.min.js"></script>
<div id="no-drop" class="draggable drag-drop"> #no-drop </div>

<div id="yes-drop" class="draggable drag-drop"> #yes-drop </div>

<div id="outer-dropzone" class="dropzone">
  #outer-dropzone
  <div id="inner-dropzone" class="dropzone">#inner-dropzone</div>
 </div>

CSS

#outer-dropzone {
  height: 140px;
}

#inner-dropzone {
  height: 80px;
}

.dropzone {
  background-color: #ccc;
  border: dashed 4px transparent;
  border-radius: 4px;
  margin: 10px auto 30px;
  padding: 10px;
  width: 80%;
  transition: background-color 0.3s;
}

.drop-active {
  border-color: #aaa;
}

.drop-target {
  background-color: #29e;
  border-color: #fff;
  border-style: solid;
}

.drag-drop {
  display: inline-block;
  min-width: 40px;
  padding: 2em 0.5em;

  color: #fff;
  background-color: #29e;
  border: solid 2px #fff;

  -webkit-transform: translate(0px, 0px);
          transform: translate(0px, 0px);

  transition: background-color 0.3s;
}

.drag-drop.can-drop {
  color: #000;
  background-color: #4e4;
}

JavaScript

/* The dragging code for '.draggable' from the demo above
 * applies to this demo as well so it doesn't have to be repeated. */

// enable draggables to be dropped into this
interact('.dropzone').dropzone({
  // only accept elements matching this CSS selector
  accept: '#yes-drop',
  // Require a 75% element overlap for a drop to be possible
  overlap: 0.75,

  // listen for drop related events:

  ondropactivate: function (event) {
    // add active dropzone feedback
    event.target.classList.add('drop-active');
  },
  ondragenter: function (event) {
    var draggableElement = event.relatedTarget,
        dropzoneElement = event.target;

    // feedback the possibility of a drop
    dropzoneElement.classList.add('drop-target');
    draggableElement.classList.add('can-drop');
    draggableElement.textContent = 'Dragged in';
  },
  ondragleave: function (event) {
    // remove the drop feedback style
    event.target.classList.remove('drop-target');
    event.relatedTarget.classList.remove('can-drop');
    event.relatedTarget.textContent = 'Dragged out';
  },
  ondrop: function (event) {
    event.relatedTarget.textContent = 'Dropped';
  },
  ondropdeactivate: function (event) {
    // remove active dropzone feedback
    event.target.classList.remove('drop-active');
    event.target.classList.remove('drop-target');
  }
});