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<?xml version="1.0" encoding="utf-8"?>
<head>
<title>Drag and drop from object: dropping block element onto canvas</title>
<style type="text/css">
object
{width:150px;
height:150px;
border-style:none;}
</style>
<script type="application/ecmascript">
function paint(color)
{var canvas = document.querySelector('canvas'),
c = canvas.getContext('2d');
c.fillStyle = color;
c.beginPath();
c.moveTo(0,0);
c.lineTo(100,0);
c.lineTo(100,100);
c.lineTo(0,100);
c.closePath();
c.fill();}
function start(event)
{event.dataTransfer.effectAllowed = 'copy';
event.dataTransfer.setData('text/plain', 'green');}
</script>
</head>
<body onload="paint('gray')">
<p><object type="application/xhtml+xml" data="data:application/xhtml+xml,%3Chtml%20xmlns%3D%22http%3A//www.w3.org/1999/xhtml%22%3E%3Chead%3E%3Ctitle%3ECanvas%20drag%20and%20drop%3C/title%3E%3Cstyle%20type%3D%22text/css%22%3Ediv%7Bwidth%3A20px%3Bheight%3A20px%3Bbackground-color%3Agreen%3B%7D%3C/style%3E%3Cscript%20type%3D%22application/ecmascript%22%3Efunction%20start%28event%29%7Bevent.dataTransfer.effectAllowed%20%3D%20%27copy%27%3Bevent.dataTransfer.setData%28%27text/plain%27%2C%20%27green%27%29%3B%7D%3C/script%3E%3C/head%3E%3Cbody%3E%3Cdiv%20draggable%3D%22true%22%20ondragstart%3D%22start%28event%29%22/%3E%3C/body%3E%3C/html%3E">Green box</object></p>
<p>Drag green box above to the gray canvas below. Canvas should turn green when you drop green box on it.</p>
<p>
<canvas width="100" height="100" ondragenter="event.preventDefault()" ondragover="return false" ondrop="paint(event.dataTransfer.getData('text/plain'))">Canvas</canvas>
</p>
</body>
</html>