[Home](./index.md) > [server](./server.md) > [EventRouter](./server.eventrouter.md) > [on](./server.eventrouter.on.md) ## EventRouter.on() method Register a listener for a specific event type. **Signature:** ```typescript on(eventType: TEventType, listener: (payload: EventPayloads[TEventType]) => void): void; ``` ## Parameters

Parameter	Type	Description
eventType	TEventType	The type of event to listen for.
listener	(payload: [EventPayloads](./server.eventpayloads.md)\[TEventType\]) => void	The listener function to invoke when the event is emitted.

**Returns:** void ## Remarks Listeners are invoked in the order they are registered.