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CSS Base

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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.

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Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

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Code Indentation


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

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.

              <div id="bg"></div>
<div id="container"></div>

#bg {
              var stage;
var initCoords = {x:0, y:0};

  function writeMessage(message) {
      stage = new Kinetic.Stage({
        container: 'container',
        width: 1024,
        height: 800
      var layer = new Kinetic.Layer();

      var text = new Kinetic.Text({
        x: 10,
        y: 10,
        fontFamily: 'Calibri',
        fontSize: 24,
        text: 'Drag the blue rectangle inside (or outside) of the yellow one and Drop it',
        fill: 'white'
      var box = new Kinetic.Rect({
        x: 589,
        y: 100,
        offset: [50, 25],
        width: 100,
        height: 50,
        fill: '#00D2FF',
        stroke: 'black',
        strokeWidth: 4,
        draggable: true
      var boxTarget = new Kinetic.Rect({
        x: 100,
        y: 100,
        offset: [50, 25],
        width: 200,
        height: 100,
        fill: '#fec72c',
        stroke: 'white',
        strokeWidth: 4,
        draggable: false,
        name: "droppable"

      // write out drag and drop events
      box.on('dragstart', function(e) {
        initCoords = {x:e.target.x(), y:e.target.y()};
      box.on('dragend', function(e) {


function onDragEnd(e) {
  var droppableTargets  = stage.find('.droppable');
  var draggable = e.target;
  for(var i=0;i<droppableTargets.length;i++){
    // we use the fit calculation
    var result = doObjectsFit(draggable, droppableTargets[i]);
    if(result === true) {
      var targetW = droppableTargets[i].width();
      var targetH = droppableTargets[i].height();
      var targetX = droppableTargets[i].x() + (targetW/2 - draggable.width()/2);
      var targetY = droppableTargets[i].y() + (targetH/2 - draggable.height()/2);
      return true;
    else {
      var tween = new Kinetic.Tween({
        node: draggable, 
        duration: 0.4,
        x: initCoords.x,
        y: initCoords.y

function doObjectsTouch(a, b) { // a and b are your objects
   return !(
    ((a.y() + a.height()) < (b.y())) ||
    (a.y() > (b.y() + b.height())) ||
    ((a.x() + a.width()) < b.x()) ||
    (a.x() > (b.x() + b.width()))

function doObjectsFit(a, b) { // a and b are your objects
   if( (a.y()) > (b.y()) &&
       (a.y() + a.height()) <= (b.y() + b.height()) &&
       (a.x()) > (b.x()) &&
       (a.x() + a.width()) < (b.x()+b.width())
     return true;

function doObjectsIntersect(a, b) { // a and b are your objects
   if( (a.y()) > (b.y()+b.height()/2) &&
       (a.y() + a.height()) <= (b.y() + b.height()) &&
       (a.x()) > (b.x()) &&
       (a.x() + a.width()) < (b.x()+b.width())
     return true;

/*function droppable(elem, settings){
  var tolerance = settings.tolerance || "intersect"; // fit, intersect, touch
  var accept = settings.accept || "";
  var hover_style_color = settings.hover_style.color;
  var hover_style_stroke = settings.hover_style.stroke;
  var hover_style_background = settings.hover_style.background;
  var drop_style_background = settings.drop_style.background;
  var onDrop = settings.onDrop;
  var onHover = settings.onHover;
  var _stage = settings.stageObj;
  var reverse = settings.reverse || true;
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