// Bindings to HTML; replace these with your components.
var $dropArea = $('#dropArea');
var $picsHolder = $('#picsHolder');

// Attach our drag and drop handlers.
$dropArea.bind({
  dragover: function() {
    $(this).addClass('hover');
    return false;
  },
  dragend: function() {
    $(this).removeClass('hover');
    return false;
  },
  drop: function(e) {
    e = e || window.event;
    e.preventDefault();

    // jQuery wraps the originalEvent, so we try to detect that here...
    e = e.originalEvent || e;
    // Using e.files with fallback because e.dataTransfer is immutable and can't be overridden in Polyfills (http://sandbox.knarly.com/js/dropfiles/).            
    var files = (e.files || e.dataTransfer.files);

    var $img = $('<img src="" class="uploadPic" title="" alt="" />');
    for (var i = 0; i < files.length; i++) {
      (function(i) {
        // Loop through our files with a closure so each of our FileReader's are isolated.
        var reader = new FileReader();
        reader.onload = function(event) {
          var newImg = $img.clone().attr({
            src: event.target.result,
            title: (files[i].name),
            alt: (files[i].name)
          });

          // Resize large images...
          if (newImg.size() > 480) {
            newImg.width(480);
          }

          $picsHolder.append(newImg);
        };
        reader.readAsDataURL(files[i]);
      })(i);
    }

    return false;
  }
});


#dropArea {
  border: 10px dashed;
  border-radius: 10px;
  border-color: gray;
  width: 200px;
  height: 200px;
}
#dropArea:hover {
  border-color: black;
}


<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="picsHolder"></div>
<div id="dropArea"></div>