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HTML

              
                <ul id="columns">
  <li class="column" draggable="true"><header>A</header></li>
  <li class="column" draggable="true"><header>B</header></li>
  <li class="column" draggable="true"><header>C</header></li>
  <li class="column" draggable="true"><header>D</header></li>
  <li class="column" draggable="true"><header>E</header></li>
</ul>
<p>This is a modificaton of a pen 
  I found here <a href="https://codepen.io/retrofuturistic/pen/tlbHE?editors=0011">https://codepen.io/retrofuturistic/pen/tlbHE?editors=0011</a><br>
  FYI: this is not mobile friendly. But it was fun to think through.
</p>





              
            
!

CSS

              
                [draggable] {
  -moz-user-select: none;
  -khtml-user-select: none;
  -webkit-user-select: none;
  user-select: none;
  /* Required to make elements draggable in old WebKit */
  -khtml-user-drag: element;
  -webkit-user-drag: element;
}

#columns {
  list-style-type: none;
}

.column {
  width: 162px;
  padding-bottom: 5px;
  padding-top: 5px;
  text-align: center;
  cursor: move;
}
.column header {
  height: 20px;
  width: 150px;
  color: black;
  background-color: #ccc;
  padding: 5px;
  border-bottom: 1px solid #ddd;
  border-radius: 10px;
  border: 2px solid #666666;
}

.column.dragElem {
  opacity: 0.4;
}
.column.over {
  //border: 2px dashed #000;
  border-top: 2px solid blue;
}

              
            
!

JS

              
                // This is my modification of this one: https://codepen.io/retrofuturistic/pen/tlbHE?editors=0011
var dragSrcEl = null;

function handleDragStart(e) {
  // Target (this) element is the source node.
  dragSrcEl = this;

  e.dataTransfer.effectAllowed = 'move';
  e.dataTransfer.setData('text/html', this.outerHTML);

  this.classList.add('dragElem');
}
function handleDragOver(e) {
  if (e.preventDefault) {
    e.preventDefault(); // Necessary. Allows us to drop.
  }
  this.classList.add('over');// puts drop indicator border on

  e.dataTransfer.dropEffect = 'move';  // See the section on the DataTransfer object.

  return false;
}

function handleDragEnter(e) {
  // this / e.target is the current hover target.
  //think this is if you want a drop-on target callback?
}

function handleDragLeave(e) {
  this.classList.remove('over');  // this / e.target is previous target element.
   this.classList.remove('dragElem');//removes dragging opacity
}

function handleDrop(e) {
  // this/e.target is current target element.

  if (e.stopPropagation) {
    e.stopPropagation(); // Stops some browsers from redirecting.
  }

  // Don't do anything if dropping the same column we're dragging.
  if (dragSrcEl !== this) {
    // Set the source column's HTML to the HTML of the column we dropped on.
    
    this.parentNode.removeChild(dragSrcEl);
    var dropHTML = e.dataTransfer.getData('text/html');
    this.insertAdjacentHTML('beforebegin',dropHTML);
    var dropElem = this.previousSibling;
    addDnDHandlers(dropElem);
    //console.log('beamer');
  }
  this.classList.remove('over');
  //remove opacity
   this.classList.remove('dragElem');
  //console.log('sucess');
  return false;
}

function handleDragEnd(e) {
  // this/e.target is the source node.
  this.classList.remove('over');
//remove opacity
  this.classList.remove('dragElem');

}

function addDnDHandlers(elem) {
  elem.addEventListener('dragstart', handleDragStart, false);
  elem.addEventListener('dragenter', handleDragEnter, false)
  elem.addEventListener('dragover', handleDragOver, false);
  elem.addEventListener('dragleave', handleDragLeave, false);
  elem.addEventListener('drop', handleDrop, false);
  elem.addEventListener('dragend', handleDragEnd, false);

}

//creates a cols array off all the <li>'s
var cols = document.querySelectorAll('#columns .column');

//loops through cols array adding all 6 listeners to <li>'s
[].forEach.call(cols, addDnDHandlers);


              
            
!
999px

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