declare function random(length: number): string;
declare function parseQuery(source: string): (readonly [string, string])[];
declare function buildQuery(params: ReadonlyArray<readonly [string, string]>): string;
declare function toUrlBase64(source: string): string;
declare function fromUrlBase64(source: string): string;
declare function unicodeLength(source: string): number;
declare function unicodeIndex(source: string, index: number): number;
declare function jsLength(source: string, length: number): number;
export declare const Str: {
    random: typeof random;
    toUrlBase64: typeof toUrlBase64;
    fromUrlBase64: typeof fromUrlBase64;
    parseQuery: typeof parseQuery;
    buildQuery: typeof buildQuery;
    unicodeLength: typeof unicodeLength;
    unicodeIndex: typeof unicodeIndex;
    jsLength: typeof jsLength;
};
export {};