test-csp-violation-frame-ancestor-parent.html

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<html>

  <head>

    <title>CSP frame-ancestors Violation Test

    </title>

    <base href="https://evil.com/">

  </head>

  <body>

    <iframe src="https://example.com/browser/devtools/client/webconsole/test/browser/test-csp-violation-frame-ancestor-child.html"></iframe>

  </body>

  <script>

    "use strict";

    window.violate = () => {

      const iframe = document.querySelector("iframe");

      const src = iframe.src;

      iframe.src = "";

      requestAnimationFrame(() => {

        iframe.src = src;

});

};

  </script>

</html>