[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Debugger](./puppeteer.protocol.debugger.md) > [SetBreakpointByUrlRequest](./puppeteer.protocol.debugger.setbreakpointbyurlrequest.md) > [lineNumber](./puppeteer.protocol.debugger.setbreakpointbyurlrequest.linenumber.md) ## Protocol.Debugger.SetBreakpointByUrlRequest.lineNumber property Line number to set breakpoint at. Signature: ```typescript lineNumber: integer; ```