file_pdfjs_frames.html

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<!doctype html>

<html>

  <head>

    <meta charset="utf-8" />

    <title>A page with PDFs in frames it doesn't display</title>

  </head>

  <body>

    <dialog>

      <iframe src="file_pdfjs_test.pdf?dialog" width="600" height="400"></iframe>

    </dialog>

    <div style="display: none">

      <iframe src="file_pdfjs_test.pdf?hidden" width="600" height="400"></iframe>

    </div>

    <iframe src="file_pdfjs_test.pdf?shown" width="600" height="400"></iframe>

  </body>

</html>