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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [ServiceWorker](./puppeteer.protocol.serviceworker.md) &gt; [ServiceWorkerVersion](./puppeteer.protocol.serviceworker.serviceworkerversion.md) &gt; [registrationId](./puppeteer.protocol.serviceworker.serviceworkerversion.registrationid.md)

## Protocol.ServiceWorker.ServiceWorkerVersion.registrationId property

<b>Signature:</b>

```typescript
registrationId: RegistrationID;
```