<!DOCTYPE html>
<meta charset='utf-8'>
<title>drag &amp; drop – crash when drag is interrupted by dialogs</title>
<style>
  body > div {
    height: 200px;
    width: 200px;
    background-color: orange;
    position: absolute;
    top: 8px;
    left: 8px;
  }
  body > div * {
    display: none;
  }
  body > div + div {
    background-color: navy;
    left: 250px;
  }
  p {
    margin-top: 220px;
  }
</style>

<script>
window.onload = function() {
	var doneonce = false;
  document.getElementsByTagName('div')[0].ondragstart = function(e) {
		alert( doneonce ? 'Dismiss this dialog. PASS if the browser does not crash.' : 'Dismiss this dialog. The browser should not crash. Without re-focusing the page first, try dragging the orange square a second time. If a second alert does not appear, release the drag, and then try dragging the orange square a third time.' );
		doneonce = true;
  };
};
</script>

<div draggable='true' itemscope></div><div></div>

<p>Try to drag the orange square onto the blue square.</p>
<noscript><p>Enable JavaScript and reload</p></noscript>