[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Runtime](./puppeteer.protocol.runtime.md) > [EvaluateRequest](./puppeteer.protocol.runtime.evaluaterequest.md) > [expression](./puppeteer.protocol.runtime.evaluaterequest.expression.md) ## Protocol.Runtime.EvaluateRequest.expression property Expression to evaluate. Signature: ```typescript expression: string; ```