MessageEvent class
The interface represents a message received by a target object. This is used to represent messages in:
Server-sent events (see EventSource.onmessage).
Web sockets (see the onmessage property of the WebSocket
interface).
Cross-document messaging (see Window.postMessage() and
Window.onmessage).
Channel messaging (see MessagePort.postMessage() and
MessagePort.onmessage).
Cross-worker/document messaging (see the above two entries, but
also Worker.postMessage(), Worker.onmessage,
ServiceWorkerGlobalScope.onmessage, etc.)
Broadcast channels (see Broadcastchannel.postMessage()) and
BroadcastChannel.onmessage).
WebRTC data channels (see RTCDataChannel.onmessage).
The action triggered by this event is defined in a function set
as the event handler for the relevant message event (e.g. using
an onmessage handler as listed above).
Note: This feature is available in Web Workers
Event
MessageEvent
- Implemented types
- Available extensions
- Annotations
-
- @JS()
- @staticInterop
Constructors
- MessageEvent(String type, [MessageEventInit? eventInitDict])
-
factory
Properties
- bubbles → bool
-
Available on Event, provided by the PropsEvent extension
no setter - cancelable → bool
-
Available on Event, provided by the PropsEvent extension
no setter - cancelBubble ↔ bool
-
Available on Event, provided by the PropsEvent extension
getter/setter pair - composed → bool
-
Available on Event, provided by the PropsEvent extension
no setter - currentTarget → EventTarget?
-
Available on Event, provided by the PropsEvent extension
no setter - data → dynamic
-
Available on MessageEvent, provided by the PropsMessageEvent extension
no setter - defaultPrevented → bool
-
Available on Event, provided by the PropsEvent extension
no setter - eventPhase → int
-
Available on Event, provided by the PropsEvent extension
no setter - hashCode → int
-
The hash code for this object.
no setterinherited
- isTrusted → bool
-
Available on Event, provided by the PropsEvent extension
no setter - lastEventId → String
-
Available on MessageEvent, provided by the PropsMessageEvent extension
no setter - origin → String
-
Available on MessageEvent, provided by the PropsMessageEvent extension
no setter -
ports
→ Iterable<
MessagePort> -
Available on MessageEvent, provided by the PropsMessageEvent extension
no setter - returnValue ↔ dynamic
-
Available on Event, provided by the PropsEvent extension
getter/setter pair - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- source → dynamic
-
Available on MessageEvent, provided by the PropsMessageEvent extension
no setter - srcElement → EventTarget?
-
Available on Event, provided by the PropsEvent extension
no setter - target → EventTarget?
-
Available on Event, provided by the PropsEvent extension
no setter - timeStamp → double
-
Available on Event, provided by the PropsEvent extension
no setter - type → String
-
Available on Event, provided by the PropsEvent extension
no setter
Methods
-
composedPath(
) → Iterable< EventTarget> -
Available on Event, provided by the PropsEvent extension
-
initEvent(
String type, [bool? bubbles = false, bool? cancelable = false]) → void -
Available on Event, provided by the PropsEvent extension
-
initMessageEvent(
String type, [bool? bubbles = false, bool? cancelable = false, dynamic data, String? origin = '', String? lastEventId = '', dynamic source, Iterable< MessagePort> ? ports = const []]) → void -
Available on MessageEvent, provided by the PropsMessageEvent extension
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
preventDefault(
) → void -
Available on Event, provided by the PropsEvent extension
-
stopImmediatePropagation(
) → void -
Available on Event, provided by the PropsEvent extension
-
stopPropagation(
) → void -
Available on Event, provided by the PropsEvent extension
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited