snowplow/snowplow-javascript-tracker

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

## Tracker interface

<b>Signature:</b>

```typescript
interface Tracker extends TrackerCore 
```
<b>Extends:</b> TrackerCore

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [setDomainUserId](./node-tracker.tracker.setdomainuserid.md) | (userId: string) =&gt; void | Set the domain user ID |
|  [setNetworkUserId](./node-tracker.tracker.setnetworkuserid.md) | (userId: string) =&gt; void | Set the network user ID |
|  [setSessionId](./node-tracker.tracker.setsessionid.md) | (sessionId: string) =&gt; void | Set the session ID (<code>domain_sessionid</code> in the atomic events) |
|  [setSessionIndex](./node-tracker.tracker.setsessionindex.md) | (sessionIndex: string \| number) =&gt; void | Set the session index (<code>domain_sessionidx</code> in the atomic events) |