/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
declare global {
    /**
     * Additional `EventTarget` methods added by `Zone.js`.
     *
     * 1. removeAllListeners, remove all event listeners of the given event name.
     * 2. eventListeners, get all event listeners of the given event name.
     */
    interface EventTarget {
        /**
         *
         * Remove all event listeners by name for this event target.
         *
         * This method is optional because it may not be available if you use `noop zone` when
         * bootstrapping Angular application or disable the `EventTarget` monkey patch by `zone.js`.
         *
         * If the `eventName` is provided, will remove event listeners of that name.
         * If the `eventName` is not provided, will remove all event listeners associated with
         * `EventTarget`.
         *
         * @param eventName the name of the event, such as `click`. This parameter is optional.
         */
        removeAllListeners?(eventName?: string): void;
        /**
         *
         * Retrieve all event listeners by name.
         *
         * This method is optional because it may not be available if you use `noop zone` when
         * bootstrapping Angular application or disable the `EventTarget` monkey patch by `zone.js`.
         *
         * If the `eventName` is provided, will return an array of event handlers or event listener
         * objects of the given event.
         * If the `eventName` is not provided, will return all listeners.
         *
         * @param eventName the name of the event, such as click. This parameter is optional.
         */
        eventListeners?(eventName?: string): EventListenerOrEventListenerObject[];
    }
}
export {};