snowplow/snowplow-javascript-tracker

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[Home](./index.md) &gt; [@snowplow/node-tracker](./node-tracker.md) &gt; [Tracker](./node-tracker.tracker.md) &gt; [setSessionIndex](./node-tracker.tracker.setsessionindex.md)

## Tracker.setSessionIndex property

Set the session index (`domain_sessionidx` in the atomic events)

<b>Signature:</b>

```typescript
setSessionIndex: (sessionIndex: string | number) => void;
```