Event 对象

HTML DOM 中的所有事件对象都基于事件对象。

所有事件对象（例如鼠标事件和键盘事件) 可以访问事件对象的属性和方法。

事件对象事件

Event	Occurs When
abort	The loading of a media is aborted
afterprint	A page has started printing
beforeprint	A page is about to be printed
beforeunload	Before the document is about to be unloaded
canplay	The browser can start playing a media (has buffered enough to begin)
canplaythrough	The browser can play through a media without stopping for buffering
change	The content of a form element have changed
ended	A media has reach the end ("thanks for listening")
error	An error has occurred while loading a file
fullscreenchange	An element is displayed in fullscreen mode
fullscreenerror	An element can not be displayed in fullscreen mode
input	An element gets user input
invalid	An element is invalid
load	An object has loaded
loadeddata	Media data is loaded
loadedmetadata	Meta data (like dimensions and duration) are loaded
message	A message is received through the event source
offline	The browser starts working offline
online	the browser starts working online
open	A connection with the event source is opened
pause	A media is paused
play	A media has started or is no longer paused
playing	A media is playing after beeing paused or buffered
progress	The browser is downloading media data
ratechange	The playing speed of a media is changed
resize	The document view is resized
reset	A form is reset
scroll	A scrollbar is being scrolled
search	Something is written in a search field
seeked	Skipping to a new position is finished
seeking	Skipping to a new position is started
select	A user selects some text
show	A <menu> element is shown as a context menu
stalled	The browser is trying to get unavailable media data
submit	A form is submitted
suspend	The browser is intentionally not getting media data
timeupdate	The playing position has changed (the user moves to a different point in the media)
toggle	The user opens or closes a <details> element
unload	A page has unloaded
waiting	A media is paused but is expected to resume (e.g. buffering)
volumechange	The volume of a media is changed (includes muting)

HTML DOM 中的所有事件对象都基于事件对象。

所有事件对象（例如鼠标事件和键盘事件) 可以访问事件对象的属性和方法。

事件属性和方法

Property/Method	Description
bubbles	Returns whether or not a specific event is a bubbling event
cancelBubble	Sets or returns whether the event should propagate up the hierarchy or not
cancelable	Returns whether or not an event can have its default action prevented
composed	Returns whether the event is composed or not
createEvent()	Creates a new event
composedPath()	Returns the event's path
currentTarget	Returns the element whose event listeners triggered the event
defaultPrevented	Returns whether or not the preventDefault() method was called for the event
eventPhase	Returns which phase of the event flow is currently being evaluated
isTrusted	Returns whether or not an event is trusted
preventDefault()	Cancels the event if it is cancelable, meaning that the default action that belongs to the event will not occur
stopImmediatePropagation()	Prevents other listeners of the same event from being called
stopPropagation()	Prevents further propagation of an event during event flow
target	Returns the element that triggered the event
timeStamp	Returns the time (in milliseconds relative to the epoch) at which the event was created
type	Returns the name of the event

❮ DOM 事件 ❮ 事件对象