<!DOCTYPE html>

<html>
<head>
    <style>
        .box {
          width: 100px;
          height: 100px;
          background-color: silver;
          border: 2px solid black;
          -webkit-box-reflect: below 5px;
        }
        
        .box.changed {
            background-color: orange;
        }
        
        .composited {
          -webkit-transform: translateZ(0);
        }
        
    </style>
</head>
<body>

    <div id="box" class="composited changed box">
    </div>
</body>
</html>