SyncEvent - Web APIs

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The SyncEvent interface represents a sync action that is dispatched on the ServiceWorkerGlobalScope of a ServiceWorker.

This interface inherits from the ExtendableEvent interface.

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Constructor

SyncEvent.SyncEvent(): Creates a new SyncEvent object.

Properties

Inherits properties from its ancestor, Event.

SyncEvent.tag Read only: Returns the developer-defined identifier for this SyncEvent.
SyncEvent.lastChance Read only: Returns true if the user agent will not make further synchronization attempts after the current attempt.

Methods

Inherits methods from its parent, ExtendableEvent.

None.

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`SyncEvent` ExperimentalNon-standard	Chrome Full support 49	Edge Full support ≤79	Firefox ?	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android Full support 49	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support 5.0
`SyncEvent()` constructor ExperimentalNon-standard	Chrome Full support 49	Edge Full support ≤79	Firefox ?	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android Full support 49	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support 5.0
`lastChance` ExperimentalNon-standard	Chrome Full support 49	Edge Full support ≤79	Firefox ?	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android Full support 49	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support 5.0
`tag` ExperimentalNon-standard	Chrome Full support 49	Edge Full support ≤79	Firefox ?	IE ?	Opera ?	Safari ?	WebView Android No support No	Chrome Android Full support 49	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support 5.0

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.: Non-standard. Expect poor cross-browser support.