overflow-body-stop-propagation.html

<!DOCTYPE html>
<html>
<head>
<style>
html {
    overflow: hidden;
}

body {
    overflow: hidden;
    position: relative;
    height: 0px;
    margin: 0px;
}

div {
    position: absolute;
}
</style>
</head>
<body>
    <div>This checks that we don't wrongly propagate the body's overflow clip when we shouldn't.<br>This text should be visible in the output.</div>
    <script>
        document.body.offsetTop;

        // This removes the body's overflow clip propagation, which should make the text above appear.
        document.documentElement.style.overflow = "visible";
        document.body.style.overflowY = "visible";
    </script>
</body>
</html>

chromium/third_party/blink/web_tests/fast/overflow/overflow-body-stop-propagation.html