<!DOCTYPE html>
<html>
  <head>
    <title>Am I sandboxed?</title>
    <meta charset="utf-8"/>
  </head>
  <body style="background-color: pink">

    <p style="color: black;">I'm NOT allowed to execute JavaScript.</p>

    <script>
      document.querySelector('p').textContent = "I can execute JavaScript.";
      document.body.style.backgroundColor = "lightgreen";
    </script>

    <p><a href="./am-i-sandboxed.html" target="_blank">Open this page as a popup</a></p>

    <p><button onclick="alert('I can open modal dialog!')">Open an alert dialog</button></p>

    <p><button onclick="top.location='./framebusting-success.html'">Navigate top frame</button></p>

    <p><a href="./framebusting-without-user-activation.html" target="_blank">Open a popup to test top navigation without user activation</a></p>

  </body>
</html>