[Home](./index.md) > [@snowplow/browser-tracker](./browser-tracker.md) > [EmitterConfigurationBase](./browser-tracker.emitterconfigurationbase.md) > [eventStore](./browser-tracker.emitterconfigurationbase.eventstore.md) ## EmitterConfigurationBase.eventStore property Enables providing a custom EventStore implementation to store events before sending them to the collector. Signature: ```typescript eventStore?: EventStore; ```