[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [ServiceWorker](./puppeteer.protocol.serviceworker.md) > [ServiceWorkerErrorMessage](./puppeteer.protocol.serviceworker.serviceworkererrormessage.md) > [lineNumber](./puppeteer.protocol.serviceworker.serviceworkererrormessage.linenumber.md) ## Protocol.ServiceWorker.ServiceWorkerErrorMessage.lineNumber property Signature: ```typescript lineNumber: integer; ```