ExtendableEvent class

The interface extends the lifetime of the install and activate events dispatched on the global scope as part of the service worker lifecycle. This ensures that any functional events (like FetchEvent) are not dispatched until it upgrades database schemas and deletes the outdated cache entries. If waitUntil() is called outside of the handler, the browser should throw an InvalidStateError; note also that multiple calls will stack up, and the resulting promises will be added to the list of extend lifetime promises.

Note: The behavior described in the above paragraph was fixed in Firefox 43 (see bug 1180274.)

This interface inherits from the Event interface.

Event

ExtendableEvent

Note: This interface is only available when the global scope is a ServiceWorkerGlobalScope. It is not available when it is a Window, or the scope of another kind of worker.

Implemented types

• Event

Implementers

• BackgroundFetchEvent
• CanMakePaymentEvent
• ContentIndexEvent
• ExtendableCookieChangeEvent
• ExtendableMessageEvent
• FetchEvent
• NotificationEvent
• PaymentRequestEvent
• PeriodicSyncEvent
• PushEvent
• PushSubscriptionChangeEvent
• SyncEvent

Available extensions

• PropsEvent
• PropsExtendableEvent

Annotations

• @experimental
• @JS()
• @staticInterop

Constructors

ExtendableEvent(String type, [ExtendableEventInit? 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

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 setter, inherited

isTrusted → bool

Available on Event, provided by the PropsEvent 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 setter, inherited

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

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

waitUntil(Future f) → void

Available on ExtendableEvent, provided by the PropsExtendableEvent extension

Operators

operator ==(Object other) → bool

The equality operator.

inherited