[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Browser](./puppeteer.protocol.browser.md) > [GetWindowForTargetRequest](./puppeteer.protocol.browser.getwindowfortargetrequest.md) > [targetId](./puppeteer.protocol.browser.getwindowfortargetrequest.targetid.md) ## Protocol.Browser.GetWindowForTargetRequest.targetId property Devtools agent host id. If called as a part of the session, associated targetId is used. Signature: ```typescript targetId?: Target.TargetID; ```