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