api-docs/docs/browser-tracker/markdown/browser-tracker.setuseridfromcookie.md
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[Home](./index.md) > [@snowplow/browser-tracker](./browser-tracker.md) > [setUserIdFromCookie](./browser-tracker.setuseridfromcookie.md)
## setUserIdFromCookie() function
Set the business-defined user ID for this user to the value of a cookie.
<b>Signature:</b>
```typescript
declare function setUserIdFromCookie(cookieName: string, trackers?: Array<string>): void;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| cookieName | string | Name of the cookie whose value will be assigned to businessUserId |
| trackers | Array<string> | The tracker identifiers which will be configured |
<b>Returns:</b>
void