import React from 'react';
export type NonCancelableEventHandler<Detail = {}> = (event: NonCancelableCustomEvent<Detail>) => void;
export type CancelableEventHandler<Detail = {}> = (event: CustomEvent<Detail>) => void;
export type NonCancelableCustomEvent<DetailType> = Omit<CustomEvent<DetailType>, 'preventDefault'>;
export interface BaseKeyDetail {
  keyCode: number;
  key: string;
  ctrlKey: boolean;
  shiftKey: boolean;
  altKey: boolean;
  metaKey: boolean;
  isComposing: boolean;
}
export interface ClickDetail {
  button: number;
  ctrlKey: boolean;
  shiftKey: boolean;
  altKey: boolean;
  metaKey: boolean;
}
export interface BaseNavigationDetail {
  href: string | undefined;
  external?: boolean;
  target?: string;
}
export declare function createCustomEvent<T>({
  cancelable,
  detail
}: CustomEventInit<T>): CustomEvent<T>;
export declare function fireNonCancelableEvent<T = null>(handler: NonCancelableEventHandler<T> | undefined, detail?: T): void;
export declare function fireCancelableEvent<T>(handler: CancelableEventHandler<T> | undefined, detail: T, sourceEvent?: React.SyntheticEvent | Event): boolean;
export declare function fireKeyboardEvent(handler: CancelableEventHandler<BaseKeyDetail> | undefined, reactEvent: React.KeyboardEvent): boolean;
export declare function hasModifierKeys(event: React.MouseEvent | React.KeyboardEvent): boolean;
export declare function isPlainLeftClick(event: React.MouseEvent | React.KeyboardEvent): boolean;