Native Drag & Drop - Data transfer on a single page

index.html

<article class="page">

  <article class="main">
    <h1>Native Drag and Drop - Data transfer on a single page</h1>
    <h3>Shows how data can be transfered from one location to another on a single page</h3>
    <p>Drag the 4 different pieces of Internet Explorer from the left container to the right container. The image data will be carried via the native API and processed on the drop zone. (If you are using Internet Explorer it will use jQuery to copy the node
      as a fallback)</p>
    <p>If your piece lands in the correct place it will be highlighted green, else it will be highlighted red. Once you have the puzzle correct you will get the completed message </p>
    <h4 class="ie-message">You appear to be on Internet Explorer. IE doesn't support the 'text/html' type (only the 'text' and 'URL' types) so jQuery will be used to copy the dragged item instead of the API (instead of copying the HTML)</h4>
    <article class="dnd-image-drag cf">
      <div class="container">
        <h3>Drag the puzzle pieces below</h3>
        <div class="inner gallery-list cf">
          <img draggable="true" src="http://tinyurl.com/omdwmau" class="drag" data-value="2" />
          <img draggable="true" src="http://tinyurl.com/q4pnwfs" class="drag" data-value="3" />
          <img draggable="true" src="http://tinyurl.com/o7k8ezu" class="drag" data-value="1" />
          <img draggable="true" src="http://tinyurl.com/p3edsdp" class="drag" data-value="4" />
        </div>
      </div>

      <div class="container">
        <h3>Drop puzzle pieces here</h3>
        <div class="inner gallery-painting cf">
          <div class="drop" data-value="1"></div>
          <div class="drop" data-value="2"></div>
          <div class="drop" data-value="3"></div>
          <div class="drop" data-value="4"></div>
        </div>
        <div class="message-container"></div>
      </div>
      <div class="reset-button">Reset Example</div>
    </article>
  </article>
</article>

Native Drag & Drop - Data transfer on a single page.markdown

Native Drag & Drop - Data transfer on a single page

Showcasing how to use the native HTML5 Drag and Drop API to move items on a page. Move the different broken up pieces of internet explorer back together to see the message!

A Pen by Simon Codrington on CodePen.

License.

script.js

jQuery(document).ready(function($) {

  //check for ie
  var userAgent = window.navigator.userAgent;
  if (userAgent.indexOf('MSIE') != -1) {
    $('.ie-message').show();
  }

  var drag_items = $('.dnd-image-drag .drag');
  var drop_items = $('.dnd-image-drag').find('.drop');

  //set up drag and drop event listeners
  function setUpEventListeners() {

    drag_items.each(function() {
      var thisDrag = $(this);
      thisDrag[0].addEventListener('dragstart', dragStart);
      thisDrag[0].addEventListener('drag', drag);
      thisDrag[0].addEventListener('dragend', dragEnd);
    });

    drop_items.each(function() {
      var thisDrop = $(this);

      thisDrop[0].addEventListener('dragenter', dragEnter);
      thisDrop[0].addEventListener('dragover', dragOver);
      thisDrop[0].addEventListener('dragleave', dragLeave);
      thisDrop[0].addEventListener('drop', drop);

    });

  }
  setUpEventListeners();

  var dragItem;

  //called as soon as the draggable starts being dragged
  //used to set up data and options
  function dragStart(event) {

    drag = event.target;
    dragItem = event.target;

    //set the effectAllowed for the drag item
    event.dataTransfer.effectAllowed = 'copy';

    var imageSrc = $(dragItem).prop('src');
    var imageHTML = $(dragItem).prop('outerHTML');

    //check for IE (it supports only 'text' or 'URL')
    try {
      event.dataTransfer.setData('text/uri-list', imageSrc);
      event.dataTransfer.setData('text/html', imageHTML);
    } catch (e) {
      event.dataTransfer.setData('text', imageSrc);
    }

    $(drag).addClass('drag-active');

  }

  //called as the draggable enters a droppable 
  //needs to return false to make droppable area valid
  function dragEnter(event) {

    var drop = this;

    //set the drop effect for this zone
    event.dataTransfer.dropEffect = 'copy';
    $(drop).addClass('drop-active');

    event.preventDefault();
    event.stopPropagation();

  }

  //called continually while the draggable is over a droppable 
  //needs to return false to make droppable area valid
  function dragOver(event) {
    var drop = this;

    //set the drop effect for this zone
    event.dataTransfer.dropEffect = 'copy';
    $(drop).addClass('drop-active');

    event.preventDefault();
    event.stopPropagation();
  }

  //called when the draggable was inside a droppable but then left
  function dragLeave(event) {
    var drop = this;
    $(drop).removeClass('drop-active');
  }

  //called continually as the draggable is dragged
  function drag(event) {

  }

  //called when the draggable has been released (either on droppable or not)
  //may be called on invalid or valid drop
  function dragEnd(event) {

    var drag = this;
    $(drag).removeClass('drag-active');

  }

  //called when draggable is dropped on droppable 
  //final process, used to copy data or update UI on successful drop
  function drop(event) {

    drop = this;
    $(drop).removeClass('drop-active');

    var dataList, dataHTML, dataText;

    //collect our data (based on what browser support we have)
    try {
      dataList = event.dataTransfer.getData('text/uri-list');
      dataHTML = event.dataTransfer.getData('text/html');
    } catch (e) {;
      dataText = event.dataTransfer.getData('text');
    }

    //we have access to the HTML
    if (dataHTML) {
      $(drop).empty();
      $(drop).prepend(dataHTML);

      //check if this element is in the right spot
      checkCorrectDrop(drop, dragItem);
      //see if the final image is complete
      checkCorrectFinalImage();
    }
    //only have access to text (old browsers + IE)
    else {
      $(drop).empty();
      $(drop).prepend($(dragItem).clone());

      //check if this element is in the right spot
      checkCorrectDrop(drop, dragItem);
      //see if the final image is complete
      checkCorrectFinalImage();
    }

    event.preventDefault();
    event.stopPropagation();
  }

  //check to see if this dropped item is in the correct spot
  function checkCorrectDrop(drop, dragItem) {

    //check if this drop is correct
    var imageValue = $(dragItem).attr('data-value');
    var dropValue = $(drop).attr('data-value');

    if (imageValue == dropValue) {
      $(drop).removeClass('incorrect').addClass('correct');
    } else {
      $(drop).removeClass('correct').addClass('incorrect');
    }

  }

  //checks to see if the dropped images are in the correct locations
  function checkCorrectFinalImage() {

    var correctItems = drop_items.filter('.correct');
    if (correctItems.length == drop_items.length) {
      $('.message-container').empty();
      $('.message-container').append('<h3>You solved the puzzle!</h3>');
      $('.message-container').append('<p>Thanks for putting Internet Explorer back together again!</p>');
      $('.message-container').append('<img src="http://tinyurl.com/nlftsar"/>');
    } else {
      $('.message-container').empty();
    }
  }

  //Reset the drop containers
  $('.reset-button').on('click', function() {
    $('.dnd-image-drag').find('.drop').children('img').remove();
    $('.dnd-image-drag').find('.drop').removeClass('correct incorrect');
    $('.message-container').empty();
  });

});

scripts

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

style.css

/*universal styling*/

html {
  font-size: 62.5%;
}

body {
  font-family: 'Open Sans', sans-serif;
  font-weight: 400;
  font-style: normal;
  font-size: 1.5rem;
  line-height: 1.5rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 150%;
  margin: 1.5rem 0rem;
}

h1 {
  font-size: 3.8rem;
  margin: 2.85rem 0rem;
}

h2 {
  font-size: 2.8rem;
  margin: 2.1rem 0rem;
}

h3 {
  font-size: 2.1rem;
  margin: 1.57rem 0rem;
}

h4 {
  font-size: 1.8rem;
}

h5 {
  font-size: 1.3rem;
}

h6 {
  font-size: 1.0rem;
}

p {
  margin: 0rem 0rem 2.4rem 0rem;
  line-height: 150%;
}

ul,
ol {
  margin-left: 25px;
  margin-bottom: 15px;
  line-height: 150%;
}
/*clearfixes*/

.cf:before,
.cf:after {
  content: " ";
  display: table;
}

.cf:after {
  clear: both;
}

*,
*:before,
*:after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section,
div {
  margin: 1.5rem 0rem;
}

div {
  margin: 0rem;
}

.page{
  max-width: 1200px;
  margin: 0px auto;
}


/*drag and drop styles*/
.dnd-image-drag .container {
  width: 48%;
  float: left;
  margin: 0% 1% 2% 1%;
}

.dnd-image-drag .gallery-list {
  min-height: 300px;
  width: 350px;
  background: #eee;
  border: solid 1px #ccc;
  padding: 15px 0px 15px 15px;
}

.dnd-image-drag .gallery-list .drag {
  width: 150px;
  float: left;
  display: inline-block;
  height: 150px;
  border: solid 1px #ccc;
  margin: 0px 15px 15px 0px;
  cursor: -webkit-grab;
  cursor: -moz-grab;
  border: solid 1px transparent;
}

.dnd-image-drag .gallery-list .drag.drag-active {
  border: solid 1px #2c3e50;
}

.dnd-image-drag .gallery-painting {
  min-height: 300px;
  width: 350px;
  background: #eee;
  background-image: url('./female.jpg');
  background-position: center center;
  background-size: cover;
  border: solid 1px #ccc;
  padding: 15px 0px 15px 15px;
}

.dnd-image-drag .gallery-painting .drop {
  position: relative;
  height: 150px;
  width: 150px;
  background: rgba(50, 50, 50, 0.7);
  display: inline-block;
  border: solid 1px #eee;
  float: left;
  margin: 0px 15px 15px 0px;
  border: solid 1px transparent;
  overflow: hidden;
}

.dnd-image-drag .gallery-painting .drop.drop-active {
  border: solid 1px #f1c40f;
}

.dnd-image-drag .gallery-painting .drop.correct {
  border: solid 1px #32ce74;
}

.dnd-image-drag .gallery-painting .drop.incorrect {
  border: solid 1px #c0392b;
}

.dnd-image-drag .gallery-painting .drop img {
  max-width: 100%;
  height: auto;
}

.reset-button {
  background: #eee;
  border: solid 1px #ccc;
  padding: 12px 15px;
  display: inline-block;
  cursor: pointer;
  margin-top: 25px;
}

.ie-message {
  display: none;
  padding: 15px;
  background: #e74c3c;
  color: #fff;
  border: dashed 2px #c0392b;
  margin-bottom: 15px;
}

styles

<link href="https://fonts.googleapis.com/css?family=Open+Sans:400,600,700,300" rel="stylesheet" />