<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width">
    <style>
        .scroller {
            width: 200px;
            height: 200px;
            border: 1px solid black;
            overflow: scroll;
        }
        .content {
            width: 200%;
            height: 200%;
        }
        
        .box {
            width: 100px;
            height: 100px;
            background-color: blue;
        }
        
        .box.appear {
            display: none;
        }
        .content.changed .box.appear {
            display: block;
        }

        .box.disappear {
            display: block;
        }
        .content.changed .box.disappear {
            display: none;
        }
        
        .composited {
            transform: translateZ(0);
        }
    </style>
    <script>
        function changeScrollerSubviews()
        {
            document.getElementById('scroll-content').classList.add('changed');
        }
    </script>
</head>
<body>
    <div class="composited scroller">
        <div id="scroll-content" class="content">
            Content
            <div class="composited box appear">appear</div>
            <div class="composited box disappear">disappear</div>
        </div>
    </div>
</body>
</html>