snowplow/snowplow-javascript-tracker

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[Home](./index.md) &gt; [@snowplow/browser-tracker](./browser-tracker.md) &gt; [ContextFilter](./browser-tracker.contextfilter.md)

## ContextFilter type

A context filter is a user-supplied callback that is evaluated for each event to determine if the context associated with the filter should be attached to the event

<b>Signature:</b>

```typescript
type ContextFilter = (args?: ContextEvent) => boolean;
```