import { SliderProps } from '../slider';
export declare const isEmpty: (value: any) => boolean;
export declare const isRealNum: (val: any) => boolean;
export declare const normalize: (val: any, precision?: number) => string;
export declare const isValidBig: (val: any) => boolean;
export declare const getClosestStep: (val: number, { min, max, step, marks }: SliderProps) => number;