web api event
ServiceWorkerGlobalScope: sync event
Secure contextAvailable in workers
The sync event of the ServiceWorkerGlobalScope interface is fired when the page (or worker) that registered the event with the SyncManager is running and as soon as network connectivity is available.
This event is not cancelable and does not bubble.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener("sync", (event) => { })
onsync = (event) => { }
Event type
A SyncEvent. Inherits from ExtendableEvent and Event.
Examples
The following example shows how to respond to a sync event in the service worker.
self.addEventListener("sync", (event) => {
if (event.tag === "sync-messages") {
event.waitUntil(sendOutboxMessages());
}
});
You can also set up the event handler using the onsync property:
self.onsync = (event) => {
// …
};
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.