[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Target](./puppeteer.protocol.target.md) > [AttachToTargetRequest](./puppeteer.protocol.target.attachtotargetrequest.md) > [flatten](./puppeteer.protocol.target.attachtotargetrequest.flatten.md) ## Protocol.Target.AttachToTargetRequest.flatten property Enables "flat" access to the session via specifying sessionId attribute in the commands. We plan to make this the default, deprecate non-flattened mode, and eventually retire it. See crbug.com/991325. Signature: ```typescript flatten?: boolean; ```