[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Target](./puppeteer.protocol.target.md) > [DetachedFromTargetEvent](./puppeteer.protocol.target.detachedfromtargetevent.md) > [sessionId](./puppeteer.protocol.target.detachedfromtargetevent.sessionid.md) ## Protocol.Target.DetachedFromTargetEvent.sessionId property Detached session identifier. Signature: ```typescript sessionId: SessionID; ```