import * as React from 'react';
export interface SingleTransitionGroupPropsType {
    children: any;
}
/**
 * 应用于同时只出现一个元素的过渡动画组。`SingleTransitionGroup`确保在过渡过程中最多出现两个正在过渡的元素。
 *
 */
export default class SingleTransitionGroup extends React.Component<SingleTransitionGroupPropsType> {
    constructor(props: SingleTransitionGroupPropsType);
    componentWillReceiveProps(nextProps: SingleTransitionGroupPropsType): void;
    children: React.ReactNode[];
    currentKey: React.Key;
    /**
     * TransitionGroup组件的childFactory属性实现。
     * 这个方法是整个组件的核心，用于实现**在过渡过程中最多出现两个正在过渡的元素**的效果。
     *
     * @memberof SingleTransitionGroup
     */
    childFactory: (child: React.ReactElement<HTMLElement, string | ((props: any) => React.ReactElement<any, string | any | (new (props: any) => React.Component<any, any, any>)>) | (new (props: any) => React.Component<any, any, any>)>) => React.ReactElement<HTMLElement, string | ((props: any) => React.ReactElement<any, string | any | (new (props: any) => React.Component<any, any, any>)>) | (new (props: any) => React.Component<any, any, any>)>;
    render(): JSX.Element;
}