[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [DOMSnapshot](./puppeteer.protocol.domsnapshot.md) > [DOMNode](./puppeteer.protocol.domsnapshot.domnode.md) > [contentDocumentIndex](./puppeteer.protocol.domsnapshot.domnode.contentdocumentindex.md) ## Protocol.DOMSnapshot.DOMNode.contentDocumentIndex property The index of a frame owner element's content document in the `domNodes` array returned by `getSnapshot`, if any. Signature: ```typescript contentDocumentIndex?: integer; ```