export declare const classNames: (...args: (string | boolean)[]) => string;
export declare function convertTime(seconds: string | number): string;
export declare function parseNumberFromString(str: string): number;
export declare function isObject<T>(item: T): boolean;
export declare function mergeDeep(target: any, ...sources: any[]): any;
export declare const randomString: (length: number) => string;
export declare const stringInterpolate: (str: string, data: Record<string, any>) => string;
export declare const isValidUrl: (url: string) => boolean;
export declare const isInArray: <T>(value: T, array: T[]) => boolean;
export declare const getHeightAndWidthFromDataUrl: (dataURL: string) => Promise<{
    width: number;
    height: number;
}>;
export declare function download(url: string, name: string): void;
export declare function clamp(num: number, min: number, max: number): number;