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> Inherited methods Name Inherited from Description addListener(listener: (args: TEventArgs) => void, scope?: any): () => void BeEvent Registers a Listener to be executed whenever this event is raised. addOnce(listener: (args: TEventArgs) => void, scope?: any): () => void BeEvent Registers a callback function to be executed only once when the event is raised. clear(): void BeEvent Clear all Listeners from this BeEvent. emit(args: TEventArgs): void BeUiEvent<TEventArgs> Raises event with single strongly typed argument. has(listener: (args: TEventArgs) => void, scope?: any): boolean BeEvent Determine whether this BeEvent has a specified listener registered. raiseEvent(...args: any[]): void BeEvent Raises the event by calling each registered listener with the supplied arguments. removeListener(listener: (args: TEventArgs) => void, scope?: any): boolean BeEvent Un-register a previously registered listener. Inherited properties Name Type Inherited from Description numberOfListeners Accessor ReadOnly number BeEvent The number of listeners currently subscribed to the event. Defined in ui/core/src/ui-core/utils/UiEvent.ts Line 14 Last Updated: 13 June, 2024