[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [DOMSnapshot](./puppeteer.protocol.domsnapshot.md) > [NodeTreeSnapshot](./puppeteer.protocol.domsnapshot.nodetreesnapshot.md) > [contentDocumentIndex](./puppeteer.protocol.domsnapshot.nodetreesnapshot.contentdocumentindex.md) ## Protocol.DOMSnapshot.NodeTreeSnapshot.contentDocumentIndex property The index of the document in the list of the snapshot documents. Signature: ```typescript contentDocumentIndex?: RareIntegerData; ```