scrollbars-area-in-iframe.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<iframe style="width:300px; height:300px; border:2px solid blue"

        src="data:text/html,<!DOCTYPE HTML>

                <html>

                <meta charset='utf-8'>

                <style>

                html {

                    border: 5px solid lime;

                    height: 100vh;

                    box-sizing: border-box;

                    overflow-y: scroll;

                </style>"></iframe>

</html>