test_bug1840932.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Document.close and successive document.open with pending stylesheet</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>

  <script>

    add_task(async () => {

      const doc = document.getElementById("ifr").contentDocument;

      doc.open()

      doc.write("<link rel='stylesheet' href='https://example.com'></link>")

      doc.close()

      doc.open()

      doc.close()

      if (doc.readyState != "complete") {

        is(doc.readyState, "interactive", "doc is loading");

        await new Promise(res => doc.addEventListener("readystatechange", res));

      is(doc.readyState, "complete", "load complete");

})

  </script>

</head>

<body>

<p id="display"></p>

<div id="content" style="display: none">

  <iframe id="ifr"></iframe>

</div>

<pre id="test"></pre>

</body>

</html>