puppeteer/new-docs/puppeteer.protocol.accessibility.queryaxtreerequest.backendnodeid.md

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [Accessibility](./puppeteer.protocol.accessibility.md) &gt; [QueryAXTreeRequest](./puppeteer.protocol.accessibility.queryaxtreerequest.md) &gt; [backendNodeId](./puppeteer.protocol.accessibility.queryaxtreerequest.backendnodeid.md)
## Protocol.Accessibility.QueryAXTreeRequest.backendNodeId property
Identifier of the backend node for the root to query.
<b>Signature:</b>
```typescript
backendNodeId?: DOM.BackendNodeId;
```