<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [CSS](./puppeteer.protocol.css.md) > [CSSStyleSheetHeader](./puppeteer.protocol.css.cssstylesheetheader.md) > [sourceMapURL](./puppeteer.protocol.css.cssstylesheetheader.sourcemapurl.md) ## Protocol.CSS.CSSStyleSheetHeader.sourceMapURL property URL of source map associated with the stylesheet (if any). <b>Signature:</b> ```typescript sourceMapURL?: string; ```