Pen Settings



CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource


Babel is required to process package imports. If you need a different preprocessor remove all packages first.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.


                <menu class="menu">
  <li class="item" draggable="true">
  <li class="item" draggable="true">
  <li class="item" draggable="true">
  <li class="item" draggable="true">
  <li class="item" draggable="true">


                [draggable] {
  user-select: none;
  cursor: move;

.menu {
  display: flex;

.item {
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 40px;
  text-align: center;
  list-style: none;
  background-color: #005DE8;
  color: white;
  border: 2px solid white;
  transition: all 250ms ease-out;

.item.over {
  border: 2px dashed #FFC82E;
  background-color: #E62899;

.item.selected {
  opacity: 0.4;


                const cols = document.querySelectorAll('.item');
let dragSrcElement = null;

/** starts the selection of the drag element and set's configuration */
function handleDragStart(e){
  // set the source element when you start dragging
  dragSrcElement = this;
  e.dataTransfer.effectAllowed = 'move';
  e.dataTransfer.setData('text/html', this.innerHTML);

function handleDragOver(e){
  /** set's the type of drag effect */
  e.dataTransfer.dropEffect = 'move';

/** marks the element we are dragging over */
function handleDragEnter(e){

/** removes mark when we leave element */
function handleDragLeave(e){

function handleDrop(e){
  /** check to see if this is the same source as what we are dragging around */
  let notSameElement = dragSrcElement != this;
  if(notSameElement) {
    /** take the source html and set it to the element we are over */
    dragSrcElement.innerHTML = this.innerHTML;
    this.innerHTML = e.dataTransfer.getData('text/html');
 * remove the over class for any element that might still have it
 * and removes the selected class from the element you where dragging
function handleDragEnd(e){
  cols.forEach(column => {
    let isOverElement = column.classList.contains('over');
    let isSelected = column.classList.contains('selected');

cols.forEach( column => {
  column.addEventListener('dragstart', handleDragStart, false);
  column.addEventListener('dragover', handleDragOver, false);
  column.addEventListener('dragenter', handleDragEnter, false);
  column.addEventListener('dragleave', handleDragLeave, false);
  column.addEventListener('drop', handleDrop, false);
  column.addEventListener('dragend', handleDragEnd, false);