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