import { IEvent, IEventEmitter } from "./IEventEmitter2";
/**
 * The minimal basic Event that can be emitted by a {@link EventEmitter2}.
 */
export interface Event<T extends string = string> extends IEvent {
    type: T;
}
/**
 * Event emitter for custom objects.
 */
export declare class EventEmitter2<EventMap extends Record<string, any> = Record<string, any>> implements IEventEmitter {
    private _listeners;
    /**
     * Registers a new listener for an event type.
     *
     * @param type - The type of event to listen to.
     * @param listener - The function that gets called when the event is fired.
     */
    addEventListener<T extends keyof EventMap>(type: T, listener: (event: EventMap[T]) => void): this;
    /**
     * Removes the listener from an event type.
     *
     * @param type - The type of the listener that gets removed.
     * @param listener - The listener function that gets removed.
     */
    removeEventListener<T extends keyof EventMap>(type: T, listener: (event: EventMap[T]) => void): this;
    /**
     * If `type` is specified, removes all registered listeners for type, otherwise removes all
     * registered listeners.
     *
     * @param type - The type of the listener that gets removed.
     */
    removeAllListeners<T extends keyof EventMap>(type?: T): this;
    /**
     * Fires the event. Calls each of the listeners registered for the event type `event.type`,
     * in the order they were registered.
     *
     * @param event - The event that gets fired.
     */
    emitEvent<T extends keyof EventMap>(event: Event<Extract<T, string>> & EventMap[T]): boolean;
    /**
     * Alias to {@link EventEmitter2.addEventListener()}
     */
    on(type: string, listener: (event: object) => void): this;
    /**
     * Alias to {@link EventEmitter2.removeEventListener()}.
     */
    off(type: string, listener: (event: object) => void): this;
    /**
     * Alias to {@link EventEmitter2.emitEvent()}.
     */
    emit(event: string | object, ...args: any[]): boolean;
}
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