import { default as React } from 'react';
export type KeyHandler = (e: React.KeyboardEvent) => void | boolean | undefined;
/**
 * Compose handlers. Stops after a handler prevents default or explicitly returns true.
 */
export declare function composeHandlers(...handlers: Array<KeyHandler | undefined>): KeyHandler;
export interface AugmentKeyboardPropsParams<E extends HTMLElement = HTMLElement> {
    baseProps: React.HTMLProps<E>;
    captureHandlers?: KeyHandler[];
    bubbleHandlers?: KeyHandler[];
}
/**
 * Safely layer our handlers around an opaque set of base props which MAY include
 * either `onKeyDown` and/or `onKeyDownCapture`, or neither. We treat their presence
 * as optional and never assume a specific ordering inside the library.
 */
export declare function augmentKeyboardProps<E extends HTMLElement>({ baseProps, captureHandlers, bubbleHandlers }: AugmentKeyboardPropsParams<E>): React.HTMLProps<E>;