portals-activate-inside-iframe.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /portals/portals-activate-inside-iframe.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

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

<body>

  <script>

    promise_test(async t => {

      assert_implements("HTMLPortalElement" in self);

      var iframe = document.createElement("iframe");

      iframe.src = "resources/portal-inside-iframe.html"

      var waitForLoad = new Promise((resolve, reject) => {

        iframe.onload = resolve;

});

      document.body.appendChild(iframe);

      await waitForLoad;

      const portal = iframe.contentDocument.getElementById("portal");

      return promise_rejects_dom(t, "InvalidStateError",

                                 iframe.contentWindow.DOMException,

                                 portal.activate());

    }, "activating portal inside iframe should fail");

  </script>

</body>