export declare const getSSRAttach: () => string;
export declare function stopPropagation(event: Event): void;
export declare function preventDefault(event: Event, isStopPropagation?: boolean): void;
export declare function hasClass(el: Element, cls: string): any;
export declare function addClass(el: Element, cls: string): any;
export declare function removeClass(el: Element, cls: string): any;
/**
 * 检查元素是否在父元素视图
 * http://stackoverflow.com/questions/123999/how-to-tell-if-a-dom-element-is-visible-in-the-current-viewport
 * @param elm 元素
 * @param parent
 * @returns boolean
 */
export declare function elementInViewport(elm: HTMLElement, parent?: HTMLElement): boolean;
/**
 * 获取当前视图滑动的距离
 * @returns { scrollTop: number, scrollLeft: number }
 */
export declare function getWindowScroll(): {
    scrollTop: number;
    scrollLeft: number;
};
/**
 * 获取当前视图的大小
 * @returns { width: number, height: number }
 */
export declare function getWindowSize(): {
    width: number;
    height: number;
};