settings_applicationsEventTarget > settings_applicationsNode > settings_applicationsElement > settings_applicationsHTMLElement > settings_applicationsHTMLMediaElement
readyState가 HAVE_ENOUGH_DATA로 변경될 때 발생한다.
readyState
HAVE_ENOUGH_DATA
htmlMediaElement.oncanplaythrough = e => { }
htmlMediaElement.addEventListener("canplaythroough", e => { })