export type NetworkType = 'bluetooth' | 'cellular' | 'ethernet' | 'none' | 'wifi' | 'wimax' | 'other' | 'unknown';
export type NetworkEffectiveType = 'slow-2g' | '2g' | '3g' | '4g' | undefined;
export interface UseNetworkReturns {
    /**
     * Whether the browser supports the Network Information API.
     */
    isSupported: boolean;
    /**
     * Whether the user is currently connected.
     */
    isOnline: boolean;
    /**
     * The time since the user was last connected.
     */
    offlineAt: number | undefined;
    /**
     * At this time, if the user is offline and reconnects.
     */
    onlineAt: number | undefined;
    /**
     * download speed in Mbps.
     */
    downlink: number | undefined;
    /**
     * The max reachable download speed in Mbps.
     */
    downlinkMax: number | undefined;
    /**
     * The detected effective speed type.
     */
    effectiveType: NetworkEffectiveType | undefined;
    /**
     * The estimated effective round-trip time of the current connection.
     */
    rtt: number | undefined;
    /**
     * If the user activated data saver mode.
     */
    saveData: boolean | undefined;
    /**
     * The detected connection/network type. Only supported in Web Worker in Chrome.
     *
     * @see https://developer.mozilla.org/zh-CN/docs/Web/API/NetworkInformation/type
     */
    type: NetworkType;
}
/**
 * A React Hook that tracks network status.
 */
export declare function useNetwork(): UseNetworkReturns;