One example on dropping shadow.

HTML:

<!DOCTYPE html>
<html>

	<head>
		<link type="text/css" rel="stylesheet" href="/index.css">
	</head>
	
	<body>
		<div id="myShadow">I am with a shadow</div>
		<div>I am without a shadow</div>
	</body>

</html>

CSS:

#myShadow {
	-webkit-filter: drop-shadow(0px 3px 5px rgba(0,0,0, 1.2));
}

Check the example here.