<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [puppeteer](./puppeteer.md) > [WebWorker](./puppeteer.webworker.md) > [\_executionContextCallback](./puppeteer.webworker._executioncontextcallback.md) ## WebWorker.\_executionContextCallback property <b>Signature:</b> ```typescript _executionContextCallback: (value: ExecutionContext) => void; ```