<!DOCTYPE html>
<title>drag &amp; drop - microdata changes after dragstart</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;
  }
  body > div + div + div {
    background-color: fuchsia;
    left: 500px;
  }
  p:first-of-type {
    margin-top: 220px;
  }
</style>

<script>

function makeEl(eltype,props,contents) {
	var elem = document.createElement(eltype);
	for( var i in props ) {
		if( props.hasOwnProperty(i) ) {
			elem.setAttribute(i,props[i]);
		}
	}
	if( contents ) {
		elem.innerHTML = contents;
	}
	return elem;
}

var orange, fails = [], doneonce = false;
window.onload = function() {
  orange = document.getElementsByTagName('div')[0];

	orange.appendChild( makeEl('meta',{itemprop:'foo',content:'test'}) );
	orange.appendChild( makeEl('audio',{itemprop:'bar',src:'test'},'fail') );
	orange.appendChild( makeEl('embed',{itemprop:'foo',src:'test'}) );
	orange.appendChild( makeEl('iframe',{itemprop:'bar',src:'test'},'fail') );
	orange.appendChild( makeEl('img',{itemprop:'foo',src:'test'}) );
	orange.appendChild( makeEl('source',{itemprop:'bar',src:'test'}) );
	orange.appendChild( makeEl('track',{itemprop:'foo',src:'test'}) );
	orange.appendChild( makeEl('video',{itemprop:'bar',src:'test'},'fail') );
	orange.appendChild( makeEl('a',{itemprop:'foo',href:'test'},'fail') );
	orange.appendChild( makeEl('area',{itemprop:'bar',href:'test'}) );
	orange.appendChild( makeEl('link',{itemprop:'foo',href:'test'}) );
	orange.appendChild( makeEl('object',{itemprop:'bar',data:'test'},'fail') );
	orange.appendChild( makeEl('time',{itemprop:'foo'},'fail') );
	orange.appendChild( makeEl('time',{itemprop:'baz',datetime:'test'},'fail') );
	orange.appendChild( makeEl('div',{itemprop:'baz'},'test') );
	orange.appendChild( makeEl('madeuponthespot',{itemprop:'foo'},'test') );
	orange.appendChild( makeEl('madeuponthespot',{itemprop:'foo',content:'test',src:'test',href:'test',data:'test',datetime:'test',value:'test'},'test') );
	orange.appendChild( makeEl('input',{itemprop:'foo',value:'test'},'test') );

  orange.ondragstart = function(e) {
		e.dataTransfer.effectAllowed = 'copy';
    e.dataTransfer.setData('Text', 'dummy text');
  	var err;
		if( err = checkprops(e.dataTransfer.getData('application/microdata+json')) ) {
			fails[fails.length] = e.type + ' ' + err;
	  }
	  //microdata should be stored and reused after the dragstart event
	  //removing the item should not cause the microdata tohave disappeared when the drop event fires
	  this.itemScope = false;
  };
  orange.nextSibling.ondragenter = orange.nextSibling.ondragleave = orange.nextSibling.ondragover =
  orange.ondrag = orange.ondragend = function(e) {
    if( e.type == 'dragover' || e.type == 'dragenter' ) {
    	e.preventDefault();
	    e.dataTransfer.dropEffect = 'copy';
    }
    if( e.dataTransfer.getData('application/microdata+json') ) {
			fails[fails.length] = e.type + ' unexpectedly had microdata (security restriction)';
    }
  };
	orange.nextSibling.ondrop = function(e) {
  	var err, md = e.dataTransfer.getData('application/microdata+json');
		orange.itemScope = true;
		if( err = checkprops(md) ) {
			fails[fails.length] = e.type + ' ' + err;
	  }
	  if( e.type != 'drop' ) { return; }
  	if( doneonce ) { return; }
  	doneonce = true;
    setTimeout(function () {
    	document.getElementsByTagName('p')[0].innerHTML = fails.length ? ( 'FAIL: ' + fails.join('<br>') ) : 'PASS';
    	fails = [];
    }, 200 );
  };

};
function checkprops(md) {
	var i;
	if( !md ) { return 'no microdata'; }
	md = JSON.parse(md);
	if( !md.items || md.items.length != 1 ) { return 'no items'; }
	if( !md.items[0].properties ) { return 'no properties'; }
	if( !md.items[0].properties.foo ) { return 'no properties.foo'; }
	if( !md.items[0].properties.bar ) { return 'no properties.bar'; }
	if( !md.items[0].properties.baz ) { return 'no properties.baz'; }
	if( md.items[0].properties.foo.length != 10 ) { return 'properties.foo length '+md.items[0].properties.foo.length+' instead of 10'; }
	if( md.items[0].properties.bar.length != 6 ) { return 'properties.bar length '+md.items[0].properties.bar.length+' instead of 6'; }
	if( md.items[0].properties.baz.length != 2 ) { return 'properties.baz length '+md.items[0].properties.baz.length+' instead of 2'; }
	for( i = 0; i < 10; i++ ) {
		if( md.items[0].properties.foo[i] != orange.properties.namedItem('foo').getValues()[i] ) { return 'properties.foo['+i+'] <i>'+md.items[0].properties.foo[i]+'</i> instead of <i>'+orange.properties.namedItem('foo').getValues()[i]+'</i>'; }
	}
	for( i = 0; i < 6; i++ ) {
		if( md.items[0].properties.bar[i] != orange.properties.namedItem('bar').getValues()[i] ) { return 'properties.bar['+i+'] <i>'+md.items[0].properties.bar[i]+'</i> instead of <i>'+orange.properties.namedItem('bar').getValues()[i]+'</i>'; }
	}
	for( i = 0; i < 2; i++ ) {
		if( md.items[0].properties.baz[i] != orange.properties.namedItem('baz').getValues()[i] ) { return 'properties.baz['+i+'] <i>'+md.items[0].properties.baz[i]+'</i> instead of <i>'+orange.properties.namedItem('baz').getValues()[i]+'</i>'; }
	}
	return '';
}

</script>

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

<p>Use your pointing device to drag the orange box to the pink box, then back to the blue box, and release it.</p>
<noscript><p>Enable JavaScript and reload</p></noscript>