[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Debugger](./puppeteer.protocol.debugger.md) > [EvaluateOnCallFrameRequest](./puppeteer.protocol.debugger.evaluateoncallframerequest.md) > [generatePreview](./puppeteer.protocol.debugger.evaluateoncallframerequest.generatepreview.md) ## Protocol.Debugger.EvaluateOnCallFrameRequest.generatePreview property Whether preview should be generated for the result. Signature: ```typescript generatePreview?: boolean; ```