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that any functional events (like FetchEvent) are not dispatched until it upgrades database schemas and deletes the outdated cache entries.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

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited