[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [DOM](./puppeteer.protocol.dom.md) > [Node](./puppeteer.protocol.dom.node.md) > [publicId](./puppeteer.protocol.dom.node.publicid.md) ## Protocol.DOM.Node.publicId property `DocumentType`'s publicId. Signature: ```typescript publicId?: string; ```