web api instance property
PeriodicSyncEvent: tag property
Limited availabilityAvailable in workers
The tag read-only property of the
PeriodicSyncEvent interface returns the developer-defined identifier for
the PeriodicSyncEvent. This is specified when calling the
register() method of the
PeriodicSyncManager interface. Multiple tags can be used by the web app
to run different periodic tasks at different frequencies.
Value
Returns a String of the defined identifier.
Examples
The following example demonstrates listening for a periodic sync event in the service
worker, and accessing the tag property.
self.addEventListener("periodicsync", (event) => {
console.log(event.tag); // logs the events tag
});
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.