| <!DOCTYPE html> |
| <html> |
| <title>View transitions: try to start a transition without a document element</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/"> |
| <link rel="author" href="mailto:vmpstr@chromium.org"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <iframe id=frame srcdoc='<svg xmlns="http://www.w3.org/2000/svg" width="10" height="10" viewBox="0 0 10 10"></svg>'> |
| </iframe> |
| |
| <script> |
| async_test((t) => { |
| requestAnimationFrame(() => requestAnimationFrame(() => { |
| t.step(() => assert_equals(frame.contentDocument.documentElement, null, "document element")); |
| t.step(() => assert_equals(frame.contentDocument.startViewTransition(), null, "transition object")); |
| t.done(); |
| })); |
| }, "transition without document element is null") |
| </script> |
