| org.w3c.dom.events.EventTarget |
The EventTarget interface is implemented by all
Nodes in an implementation which supports the DOM Event
Model. Therefore, this interface can be obtained by using
binding-specific casting methods on an instance of the Node
interface. The interface allows registration and removal of
EventListeners on an EventTarget and dispatch
of events to that EventTarget.
See also the Document Object Model (DOM) Level 2 Events Specification.
| Public Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
This method allows the registration of event listeners on the event
target.
| |||||||||||
This method allows the dispatch of events into the implementations
event model.
| |||||||||||
This method allows the removal of event listeners from the event
target.
| |||||||||||
This method allows the registration of event listeners on the event
target. If an EventListener is added to an
EventTarget while it is processing an event, it will not
be triggered by the current actions but may be triggered during a
later stage of event flow, such as the bubbling phase.
If multiple identical EventListeners are registered
on the same EventTarget with the same parameters the
duplicate instances are discarded. They do not cause the
EventListener to be called twice and since they are
discarded they do not need to be removed with the
removeEventListener method.
| type | The event type for which the user is registering |
|---|---|
| listener | The listener parameter takes an interface
implemented by the user which contains the methods to be called
when the event occurs. |
| useCapture | If true, useCapture indicates that the
user wishes to initiate capture. After initiating capture, all
events of the specified type will be dispatched to the registered
EventListener before being dispatched to any
EventTargets beneath them in the tree. Events which
are bubbling upward through the tree will not trigger an
EventListener designated to use capture.
|
This method allows the dispatch of events into the implementations
event model. Events dispatched in this manner will have the same
capturing and bubbling behavior as events dispatched directly by the
implementation. The target of the event is the
EventTarget on which dispatchEvent is
called.
| evt | Specifies the event type, behavior, and contextual information to be used in processing the event. |
|---|
dispatchEvent indicates
whether any of the listeners which handled the event called
preventDefault. If preventDefault was
called the value is false, else the value is true.| EventException | UNSPECIFIED_EVENT_TYPE_ERR: Raised if the Event's type
was not specified by initializing the event before
dispatchEvent was called. Specification of the
Event's type as null or an empty string
will also trigger this exception.
|
|---|
This method allows the removal of event listeners from the event
target. If an EventListener is removed from an
EventTarget while it is processing an event, it will not
be triggered by the current actions. EventListeners can
never be invoked after being removed.
Calling removeEventListener with arguments which do
not identify any currently registered EventListener on
the EventTarget has no effect.
| type | Specifies the event type of the EventListener
being removed. |
|---|---|
| listener | The EventListener parameter indicates the
EventListener to be removed. |
| useCapture | Specifies whether the EventListener
being removed was registered as a capturing listener or not. If a
listener was registered twice, one with capture and one without,
each must be removed separately. Removal of a capturing listener
does not affect a non-capturing version of the same listener, and
vice versa.
|