interface QueryParams {
    page?: number;
    limit?: number;
    select?: string;
    filter?: string;
    [key: string]: any;
}
declare const queryParamKeys: {
    page: string;
    limit: string;
    select: string;
    filter: string;
};
declare class QueryParamManager {
    private params;
    constructor(initialParams?: string | URLSearchParams | {
        [key: string]: string | string[];
    });
    /**
     * Parses the current URL's query string or a provided string/object into a QueryParams object.
     * @param queryInput Optional query string or object to parse. Defaults to current window.location.search.
     * @returns A QueryParams object.
     */
    static parse(queryInput?: string | {
        [key: string]: string | string[];
    }): QueryParams;
    /**
     * Gets the value of a specific query parameter.
     * @param key The key of the parameter to retrieve.
     * @returns The parameter's value as a string, or null if not found.
     */
    get(key: keyof QueryParams): string | null;
    /**
     * Sets or updates a query parameter.
     * @param key The key of the parameter.
     * @param value The value to set.
     * @returns The QueryParamManager instance for chaining.
     */
    set(key: keyof QueryParams, value: string | number | undefined): QueryParamManager;
    /**
     * Returns the query string representation of the current parameters.
     * @returns The URL-encoded query string, starting with '?'.
     */
    toString(): string;
    /**
     * Returns the current parameters as a plain object.
     * @returns A plain object representing the query parameters.
     */
    toObject(): QueryParams;
}

export { QueryParamManager, type QueryParams, queryParamKeys };