[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Page](./puppeteer.protocol.page.md) > [Frame](./puppeteer.protocol.page.frame.md) > [mimeType](./puppeteer.protocol.page.frame.mimetype.md) ## Protocol.Page.Frame.mimeType property Frame document's mimeType as determined by the browser. Signature: ```typescript mimeType: string; ```