API Reference > bentleyjs-core > Events > BeEvent > addListener addListener Method Registers a Listener to be executed whenever this event is raised. addListener(listener: T, scope?: any): () => void see BeEvent.raiseEvent, BeEvent.removeListener Parameter Type Description listener T The function to be executed when the event is raised. scope any An optional object scope to serve as the 'this' pointer when listener is invoked. Returns - () => void A function that will remove this event listener. Defined in core/bentley/src/BeEvent.ts Line 40 Last Updated: 29 November, 2022