[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Runtime](./puppeteer.protocol.runtime.md) > [CallFunctionOnRequest](./puppeteer.protocol.runtime.callfunctiononrequest.md) > [functionDeclaration](./puppeteer.protocol.runtime.callfunctiononrequest.functiondeclaration.md) ## Protocol.Runtime.CallFunctionOnRequest.functionDeclaration property Declaration of the function to call. Signature: ```typescript functionDeclaration: string; ```