import type { Syncer } from "@location-state/core";
import type { NextRouter } from "next/router.js";
export declare class NextPagesSyncer implements Syncer {
    private readonly router;
    private readonly listeners;
    constructor(router: NextRouter);
    key(): string | undefined;
    sync({ listener, signal, }: {
        listener: (key: string) => void;
        signal: AbortSignal;
    }): void;
    notify(): void;
    updateURL(url: string): void;
}