Interface ExtendableMessageEvent
AT_TARGET: 2;
bubbles: boolean;
BUBBLING_PHASE: 3;
cancelable: boolean;
cancelBubble: boolean;
CAPTURING_PHASE: 1;
composed: boolean;
currentTarget: EventTarget;
data: any;
defaultPrevented: boolean;
eventPhase: number;
isTrusted: boolean;
lastEventId: string;
NONE: 0;
origin: string;
ports: readonly MessagePort[];
returnValue: boolean;
source: MessagePort | Client | ServiceWorker;
srcElement: EventTarget;
target: EventTarget;
timeStamp: number;
type: string;
composedPath(): EventTarget[];
initEvent(type: string, bubbles?: boolean, cancelable?: boolean): void;
preventDefault(): void;
stopImmediatePropagation(): void;
stopPropagation(): void;
waitUntil(f: Promise<any>): void;
}
Hierarchy
- ExtendableEvent
- ExtendableMessageEvent (view full)
Index
Properties
Methods
Properties
ReadonlyAT_TARGET
Readonlybubbles
Returns true or false depending on how event was initialized. True if event goes through its target's ancestors in reverse tree order, and false otherwise.
ReadonlyBUBBLING_PHASE
Readonlycancelable
Returns true or false depending on how event was initialized. Its return value does not always carry meaning, but true can indicate that part of the operation during which event was dispatched, can be canceled by invoking the preventDefault() method.
cancelBubble
ReadonlyCAPTURING_PHASE
Readonlycomposed
Returns true or false depending on how event was initialized. True if event invokes listeners past a ShadowRoot node that is the root of its target, and false otherwise.
ReadonlycurrentTarget
Returns the object whose event listener's callback is currently being invoked.
Readonlydata
ReadonlydefaultPrevented
Returns true if preventDefault() was invoked successfully to indicate cancelation, and false otherwise.
ReadonlyeventPhase
Returns the event's phase, which is one of NONE, CAPTURING_PHASE, AT_TARGET, and BUBBLING_PHASE.
ReadonlyisTrusted
Returns true if event was dispatched by the user agent, and false otherwise.
ReadonlylastEventId
ReadonlyNONE
Readonlyorigin
Readonlyports
returnValue
Readonlysource
ReadonlysrcElement
Readonlytarget
Returns the object to which event is dispatched (its target).
ReadonlytimeStamp
Returns the event's timestamp as the number of milliseconds measured relative to the time origin.
Readonlytype
Returns the type of event, e.g. "click", "hashchange", or "submit".
Methods
composedPath
- composed
Path (): EventTarget[] Returns the invocation target objects of event's path (objects on which listeners will be invoked), except for any nodes in shadow trees of which the shadow root's mode is "closed" that are not reachable from event's currentTarget.
Returns EventTarget[]
initEvent
preventDefault
stopImmediatePropagation
stopPropagation
waitUntil
- wait
Until (f): void Parameters
- f: Promise<any>
Returns void
This ServiceWorker API interface represents the event object of a message event fired on a service worker (when a channel message is received on the ServiceWorkerGlobalScope from another context) — extends the lifetime of such events.
MDN Reference