/**
 * This source code is quoted from rc-tabs.
 * homepage: https://github.com/react-component/tabs
 */
import React from 'react';
import { TabBarRootNodeProps } from './iTabs';
export declare function toArray(children: React.ReactNode): any[];
export declare function getActiveIndex(children: React.ReactNode, activeKey?: string): number;
export declare function getActiveKey(children: React.ReactNode, index: number): any;
export declare function setTransform(style: React.CSSProperties, v?: string): void;
export declare function isTransformSupported(style: React.CSSProperties): boolean;
export declare function setTransition(style: React.CSSProperties, v: string): void;
export declare function getTransformPropValue(v: string): {
    transform: string;
    WebkitTransform: string;
    MozTransform: string;
};
export declare function isVertical(tabBarPosition?: string): boolean;
export declare function getTransformByIndex(index: number, tabBarPosition: string): string;
export declare function getMarginStyle(index: number, tabBarPosition: string): {
    [x: string]: string;
};
export declare function getStyle(el: HTMLElement, property: string): number;
export declare function setPxStyle(el: HTMLElement, property: string, value: number): void;
export declare function getLeft(tabNode: HTMLElement, wrapperNode: HTMLElement): number;
export declare function getTop(tabNode: HTMLElement, wrapperNode: HTMLElement): number;
export declare function getDataAttr(props: Omit<TabBarRootNodeProps, 'onKeyDown' | 'extraContent' | 'tabBarPosition' | 'children' | 'direction' | 'tabBarClassName'>): {};
export declare function requestAnimationFrame(callback: () => void): void;