<!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] -->
<html>
    <head>
        <style>
            html, body {
                margin: 0px;
            }
            ::-webkit-scrollbar {
                display: none;
            }
            .sticky {
                position: sticky;
                top: 0px;
            }
            .parent {
                height: 150vh;
            }
            .child {
                background: green;
                height: 4vh;
                width: 4vh;
            }
        <script src="../../resources/js-test.js"></script>
        </style>
    </head>
    <body>
    <div class="parent">
        <div class="sticky child"></div>
    </body>
</html>