api-docs/docs/browser-tracker/markdown/browser-tracker.browsertracker.setuseridfromreferrer.md from snowplow/snowplow-javascript-tracker

api-docs/docs/browser-tracker/markdown/browser-tracker.browsertracker.setuseridfromreferrer.md

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[Home](./index.md) &gt; [@snowplow/browser-tracker](./browser-tracker.md) &gt; [BrowserTracker](./browser-tracker.browsertracker.md) &gt; [setUserIdFromReferrer](./browser-tracker.browsertracker.setuseridfromreferrer.md)

## BrowserTracker.setUserIdFromReferrer property

Set the business-defined user ID for this user using the referrer querystring.

<b>Signature:</b>

```typescript
setUserIdFromReferrer: (querystringField: string) => void;
```