[Home](./index.md) > [@empathyco/x-components](./x-components.md) > [XBus](./x-components.xbus.md) > [on](./x-components.xbus.on.md) ## XBus.on property Retrieves an observable for an event. **Signature:** ```typescript on: (event: SomeEvent, withMetadata?: boolean) => typeof withMetadata extends true ? Observable, SomeEventMetadata>> : Observable>; ```