[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Page](./puppeteer.protocol.page.md) > [AddScriptToEvaluateOnNewDocumentRequest](./puppeteer.protocol.page.addscripttoevaluateonnewdocumentrequest.md) > [worldName](./puppeteer.protocol.page.addscripttoevaluateonnewdocumentrequest.worldname.md) ## Protocol.Page.AddScriptToEvaluateOnNewDocumentRequest.worldName property If specified, creates an isolated world with the given name and evaluates given script in it. This world name will be used as the ExecutionContextDescription::name when the corresponding event is emitted. Signature: ```typescript worldName?: string; ```