| <!DOCTYPE html> |
| <title>Moving fullscreen document's body into a fullscreen iframe</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="../trusted-click.js"></script> |
| <iframe allowfullscreen></iframe> |
| <script> |
| // wait for load event to avoid https://bugzil.la/1493878 |
| window.onload = function() { |
| async_test(t => { |
| const iframe = document.querySelector('iframe'); |
| const iframeDoc = iframe.contentDocument; |
| |
| // Enter fullscreen for the iframe's body element. |
| trusted_request(t, iframeDoc.body, iframeDoc.body); |
| document.onfullscreenchange = t.step_func(() => { |
| assert_equals(document.fullscreenElement, iframe, "document's initial fullscreen element"); |
| assert_equals(iframeDoc.fullscreenElement, iframeDoc.body, "iframe's initial fullscreen element"); |
| |
| // Then, move the outer document's body into the iframe. This is an unusual |
| // thing to do, but means that the iframe is removed from its document and |
| // should trigger fullscreen exit. |
| iframeDoc.documentElement.appendChild(document.body); |
| |
| // If we exit in an orderly fashion, that's all one can ask for. |
| document.onfullscreenchange = t.step_func_done(() => { |
| assert_equals(document.fullscreenElement, null, "document's final fullscreen element"); |
| |
| // Because the iframe was removed, its browsing context was discarded and |
| // its contentDocument has become null. Because that browsing context was |
| // neither a descendant browsing context nor had an active document, |
| // nothing at all was done with it in the exit fullscreen algorithm, so |
| // its fullscreenElement is unchanged. |
| assert_equals(iframe.contentDocument, null, "iframe's content document"); |
| assert_equals(iframeDoc.fullscreenElement, iframeDoc.body, "iframe's final fullscreen element"); |
| }); |
| }); |
| }); |
| }; |
| </script> |
