api-docs/docs/browser-tracker/markdown/browser-tracker.browsertracker.getdomainuserid.md
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[Home](./index.md) > [@snowplow/browser-tracker](./browser-tracker.md) > [BrowserTracker](./browser-tracker.browsertracker.md) > [getDomainUserId](./browser-tracker.browsertracker.getdomainuserid.md)
## BrowserTracker.getDomainUserId property
Get visitor ID (from first party cookie)
<b>Signature:</b>
```typescript
getDomainUserId: () => string;
```