<!doctype html>
<html>
	<head>
		<title>Drag and drop with cancelling dragenter on body</title>
		<style type="text/css">
div:first-child {
	height: 100px;
	width: 100px;
	background: orange;
	display: inline-block;
}
div:first-child + div {
	height: 100px;
	width: 100px;
	margin-left: 100px;
	background: blue;
	display: inline-block;
}
		</style>
		<script type="text/javascript">
window.onload = function () {
	var drag = document.getElementsByTagName('div')[0], beforecount = 0, aftercount = 0, switchcount = false;
	drag.ondragstart = function (e) {
		e.dataTransfer.setData('text','hello');
		e.dataTransfer.effectAllowed = 'copy';
	};
	drag.ondragenter = drag.ondrop = drag.ondragover = function (e) {
		e.preventDefault();
	};
	var drop = document.getElementsByTagName('div')[1];
	drop.ondragenter = function (e) {
		switchcount = true;
	};
	drop.ondragover = function (e) {
		e.preventDefault();
	};
	document.body.ondragenter = function (e) {
		if( e.target != this ) { return; }
		e.preventDefault(); //don't cancel when it bubbles from the child elements
		if( switchcount ) { aftercount++; } else { beforecount++; }
	};
	drag.ondragend = function (e) {
		document.getElementsByTagName('div')[2].innerHTML = ( beforecount == 1 && aftercount == 0 ) ? 'PASS' : ( 'FAIL, dragenter fired on body '+beforecount+' time(s) before blue.ondragenter and '+aftercount+' time(s) afterwards, instead of 1 and 0 times respectively' );
	};
};
		</script>
	</head>
	<body>

		<div draggable="true"></div><div></div>
		<div>&nbsp;</div>
		<p>Drag the orange square onto the blue square, then back to the orange square, and release it.</p>
		<noscript><p>Enable JavaScript and reload</p></noscript>

	</body>
</html>