sandbox-navigation-timing.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/sandboxing/sandbox-navigation-timing.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Sandbox Navigation Timing</title>

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<html></html>

<script>

  const sandboxUrl = location.pathname.substring(0, location.pathname.lastIndexOf('/') + 1) + 'sandbox-navigation-timing-iframe.tentative.html';

  async_test(t => {

    const iframe = document.createElement('iframe');

    iframe.src = sandboxUrl;

    document.body.appendChild(iframe); // Navigation starts; value of sandbox flags locked on.

    // This should not affect the sandbox value used for both about:blank document

    // and the final document in iframe.

    iframe.sandbox = 'allow-scripts';

    const iframeAboutBlankDocument = iframe.contentDocument;

    iframe.onload = t.step_func(() => {

      const iframeAboutBlankContents = iframeAboutBlankDocument.querySelectorAll('body');

      assert_equals(iframeAboutBlankContents[0].tagName, "BODY",

        "about:blank document's contents should still be accessible");

      iframe.contentWindow.postMessage("is iframe sandboxed?", "*");

});

    window.onmessage = t.step_func_done(e => {

      assert_equals(e.data.result, 'iframe not sandboxed');

});

  }, 'setting sandbox attribute should not affect current document in iframe');

</script>