[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [CSS](./puppeteer.protocol.css.md) > [StyleSheetOrigin](./puppeteer.protocol.css.stylesheetorigin.md) ## Protocol.CSS.StyleSheetOrigin type Stylesheet type: "injected" for stylesheets injected via extension, "user-agent" for user-agent stylesheets, "inspector" for stylesheets created by the inspector (i.e. those holding the "via inspector" rules), "regular" for regular stylesheets. Signature: ```typescript export type StyleSheetOrigin = ('injected' | 'user-agent' | 'inspector' | 'regular'); ```