| <!doctype html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <iframe id="i" src="/common/blank.html"></iframe> |
| <script> |
| async_test(t => { |
| window.onload = t.step_func(() => { |
| i.contentWindow.navigation.onnavigate = t.step_func_done(e => { |
| let iframe_constructor = i.contentWindow.DOMException; |
| i.remove(); |
| assert_throws_dom("InvalidStateError", iframe_constructor, () => e.transitionWhile(Promise.resolve())); |
| }); |
| |
| i.contentWindow.location.href = "#1"; |
| }); |
| }, "event.transitionWhile() throws if used on an event from a detached iframe"); |
| </script> |
