<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width">
    <style>
        * {
            box-sizing: border-box;
        }
        
        .container {
            width: 200px;
            height: 200px;
            border: 1px solid black;
        }

        .box {
            width: 100px;
            height: 100px;
            background-color: blue;
        }
        
        body.changed .box.disappear {
            display: none;
        }
        
        .composited {
            transform: translateZ(0);
        }
    </style>
    <script>
        function applyChange()
        {
            document.body.classList.add('changed');
        }
    </script>
</head>
<body>
    <div class="container composited">
        <div class="composited disappear box">box</div>
    </div>
</body>
</html>