skip-outbound-vt-before-reveal.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:
- /css/css-view-transitions/navigation/skip-outbound-vt-before-reveal.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<title>View transitions: outbound cross-document transition before reveal</title>

<link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/">

<link rel="author" href="mailto:nrosenthal@chromium.org">

<meta name="timeout" content="long">

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

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

<script>

  promise_test(async t => {

    const result = await new Promise(resolve => {

      const channel_name = `outbound-vt-after-reveal-${new Date().valueOf()}`;

      const bc = new BroadcastChannel(channel_name);

      bc.addEventListener("message", e => {

        resolve(e.data);

});

      const popup = window.open(`resources/outbound-before-render.html?phase=old&channel=${channel_name}`);

      t.add_cleanup(() => popup.close());

});

    assert_equals(result, "did reveal new page without transition");

  }, "when navigating away before revealing, never start a view transition");

</script>

</html>