<!DOCTYPE html>
<title>Iframe content to load a nested sandboxed iframe with all mandatory allow-* flags</title>

<body>
<iframe
  src="sandbox-mandatory-flags-iframe.sub.html?key={{GET[key]}}&value={{GET[value]}}"
  sandbox="allow-same-origin
           allow-forms
           allow-scripts
           allow-popups
           allow-popups-to-escape-sandbox
           allow-top-navigation-by-user-activation">
</iframe>
</body>
