import { Socket } from 'phoenix';
/**
 * Disconnects the socket after a delay when the page becomes hidden,
 * and reconnects when it becomes visible again. This avoids holding
 * open connections for background tabs that aren't being viewed.
 *
 * The delay prevents unnecessary disconnects during brief tab switches.
 * Phoenix channels automatically rejoin after reconnecting.
 */
export declare class PageVisibilityManager {
    private socket;
    private disconnectDelayMs;
    private disconnectTimer;
    private wasConnected;
    constructor(socket: Socket, disconnectDelayMs?: number);
    private onVisibilityChange;
    private scheduleDisconnect;
    private reconnect;
    private clearTimer;
    teardown(): void;
}
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