web api instance property
PushSubscription: subscriptionId property
Secure contextAvailable in workers
The subscriptionId read-only property of the
PushSubscription interface returns a string containing
the subscription ID associated with the push subscription.
[!WARNING] Instead of this feature, use the
endpointproperty on the same interface.
Value
A string.
Specifications
This feature was removed from the Push API specification. It is no longer on track to become a standard.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.