stylesheets-nested-iframes.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>StyleSheetsActor iframe test</title>

  <style>

p {

      padding: 1em;

  </style>

</head>

<body>

  <p>A test page with nested iframes</p>

  <iframe></iframe>

  <script type="application/javascript">

    "use strict";

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

    let i = parseInt(location.href.split("?")[1], 10) || 1;

    // The frame can't have the same src URL as any of its ancestors.

    // This will not infinitely recurse because a frame won't get a content

    // document once it's nested deeply enough.

    iframe.src = location.href.split("?")[0] + "?" + (++i);

  </script>

</body>

</html>