Testcase

jquery.width(), fullscreen, iframe

iframe_fullscreen.html

safari, fullscreen, iframe

iframe_fullscreen_remove.html

Delete iframe at the same time of exitting fullscreen mode of iframe, ":-webkit-full-screen-ancestor:not(iframe)" pseudo class remains on parent element of the iframe.

iframe内のfullscreen modeでfullscreen mode終了と同時にiframeを削除すると、iframeの親要素に :-webkit-full-screen-ancestor:not(iframe) が残る。