import { Widget } from '../widgets/Widget.js';
import { KeyEvent } from './KeyEvent.js';
/**
 * A key release {@link KeyEvent} (key up).
 *
 * @category Event
 */
export declare class KeyReleaseEvent extends KeyEvent {
    static readonly type = "key-release";
    readonly type: typeof KeyReleaseEvent.type;
    constructor(key: string, shift: boolean, ctrl: boolean, alt: boolean, virtual: boolean, target: Widget | null);
    cloneWithTarget(target: Widget | null): KeyReleaseEvent;
}