Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/html/editing/dnd/overlay/060.html 

<!doctype html>
<title>drag &amp; drop - dragging elements by children that are positioned outside them</title>
<style type="text/css">
div {
  height: 200px;
  width: 200px;
  background: blue;
  white-space: nowrap;
  position: relative;
}
span {
  display: block;
  top: 0;
  left: 210px;
  position: absolute;
  width: 100px;
  height: 100px;
  background: orange;
}
</style>
<script type="text/javascript">
window.onload = function () {
  document.getElementsByTagName('div')[0].ondragstart = function (e) {
    e.dataTransfer.effectAllowed = 'copy';
    e.dataTransfer.setData('text','dummy text');
  };
};
</script>
<div draggable="true"><span></span></div>
<p>Drag the orange square sideways. Pass if the drag placeholder shows that both the blue and orange squares are being dragged.</p>