726951-shadow-clips-ref.html
<!doctype html>
<head>
<body>
<canvas id="mycanvas" width="200" height="200"></canvas>
<script type="text/javascript">
var cx = document.getElementById('mycanvas').getContext('2d');
cx.beginPath();
cx.rect(10, 10, 50, 50);
cx.clip();
cx.beginPath();
cx.rect(0, 0, 50, 50);
cx.shadowColor = "black";
cx.shadowOffsetX = 10;
cx.shadowOffsetY = 10;
cx.fill();
</script>
