[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [ServiceWorker](./puppeteer.protocol.serviceworker.md) > [RegistrationID](./puppeteer.protocol.serviceworker.registrationid.md) ## Protocol.ServiceWorker.RegistrationID type Signature: ```typescript export type RegistrationID = string; ```