API Reference > ui-core > Utilities > UiEvent UiEvent<TEventArgs> Class iModel.js UI UiEvent class is a subclass of BeEvent with argument type safety. Extends BeUiEvent<TEventArgs> Methods Name Description constructor<TEventArgs>(): UiEvent<TEventArgs> Inherited methods Name Inherited from Description addListener(listener: (args: TEventArgs) => void, scope?: any): () => void BeUiEvent Registers a Listener to be executed whenever this event is raised. addOnce(listener: (args: TEventArgs) => void, scope?: any): () => void BeUiEvent Registers a callback function to be executed only once when the event is raised. clear(): void BeUiEvent Clear all Listeners from this BeEvent. emit(args: TEventArgs): void BeUiEvent Raises event with single strongly typed argument. has(listener: (args: TEventArgs) => void, scope?: any): boolean BeUiEvent Determine whether this BeEvent has a specified listener registered. raiseEvent(...args: [args]): void BeUiEvent Raises the event by calling each registered listener with the supplied arguments. removeListener(listener: (args: TEventArgs) => void, scope?: any): boolean BeUiEvent Un-register a previously registered listener. Inherited properties Name Type Inherited from Description numberOfListeners Accessor ReadOnly number BeUiEvent The number of listeners currently subscribed to the event. Defined in ui/core/src/ui-core/utils/UiEvent.ts Line 14 Last Updated: 12 June, 2024