PeriodicSyncEvent.tag - Web APIs 编辑

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The tag read-only property of the PeriodicSyncEvent interface returns the developer-defined identifier for the PeriodicSyncEvent. This is specified when calling the PeriodicSyncManager.register() method of the PeriodicSyncManager interface. Multiple tags can be used by the web app to run different periodic tasks at different frequencies.

Syntax

const tag = PeriodicSyncEvent.tag;

Returns a String of the defined identifier.

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
});

Specification	Status	Comment
Web Periodic Background Synchronization The definition of 'tag' in that specification.	Working Draft	Initial definition.

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