import * as React from "react";
export type BroadcastChannelData = string | number | boolean | Record<string, unknown> | undefined | null;
/**
 * React hook to create and manage a Broadcast Channel across multiple browser windows.
 *
 * @param channelName Static name of channel used across the browser windows.
 * @param handleMessage Callback to handle the event generated when `message` is received.
 * @param handleMessageError [optional] Callback to handle the event generated when `error` is received.
 * @returns A function to send/post message on the channel.
 * @example
 * ```tsx
 * import {useBroadcastChannel} from 'react-broadcast-channel';
 *
 * function App () {
 *   const postUserIdMessage = useBroadcastChannel('userId', (e) => alert(e.data));
 *   return (<button onClick={() => postUserIdMessage('ABC123')}>Send UserId</button>);
 * }
 * ```
 * ---
 * Works in browser that support Broadcast Channel API natively. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/Broadcast_Channel_API#browser_compatibility).
 * To support other browsers, install and use [broadcastchannel-polyfill](https://www.npmjs.com/package/broadcastchannel-polyfill).
 */
export declare function useBroadcastChannel<T extends BroadcastChannelData = string>(channelName: string, handleMessage?: (event: MessageEvent) => void, handleMessageError?: (event: MessageEvent) => void): (data: T) => void;
/**
 * React hook to manage state across browser windows. Has the similar signature as `React.useState`.
 *
 * @param channelName Static name of channel used across the browser windows.
 * @param initialState Initial state.
 * @returns Tuple of state and setter for the state.
 * @example
 * ```tsx
 * import {useBroadcastState} from 'react-broadcast-channel';
 *
 * function App () {
 *   const [count, setCount] = useBroadcastState('count', 0);
 *   return (
 *     <div>
 *       <button onClick={() => setCount(prev => prev - 1)}>Decrement</button>
 *       <span>{count}</span>
 *       <button onClick={() => setCount(prev => prev + 1)}>Increment</button>
 *     </div>
 *   );
 * }
 * ```
 * ---
 * Works in browser that support Broadcast Channel API natively. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/Broadcast_Channel_API#browser_compatibility).
 * To support other browsers, install and use [broadcastchannel-polyfill](https://www.npmjs.com/package/broadcastchannel-polyfill).
 */
export declare function useBroadcastState<T extends BroadcastChannelData = string>(channelName: string, initialState: T): [T, React.Dispatch<React.SetStateAction<T>>, boolean];