/** * Adds an event listener to an element. * @returns A callback to remove the event listener from the element. * * @param target * @param type * @param listener * @param options */ export declare function addListener unknown : Type extends keyof DocumentEventMap ? (this: Document, ev: DocumentEventMap[Type]) => unknown : Type extends keyof HTMLElementEventMap ? (this: HTMLElement, ev: HTMLElementEventMap[Type]) => unknown : Type extends keyof ElementEventMap ? (this: Element, ev: ElementEventMap[Type]) => unknown : EventListenerOrEventListenerObject>(target: TargetInterface | null | undefined, type: Type, listener: Listener, options?: boolean | AddEventListenerOptions): () => void;