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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [Accessibility](./puppeteer.protocol.accessibility.md) &gt; [GetPartialAXTreeRequest](./puppeteer.protocol.accessibility.getpartialaxtreerequest.md) &gt; [backendNodeId](./puppeteer.protocol.accessibility.getpartialaxtreerequest.backendnodeid.md)

## Protocol.Accessibility.GetPartialAXTreeRequest.backendNodeId property

Identifier of the backend node to get the partial accessibility tree for.

<b>Signature:</b>

```typescript
backendNodeId?: DOM.BackendNodeId;
```