/**
 * 获取 top 属性值
 * <p>
 * @param elem dom
 * */
export declare function getTop(elem: any): any;
/**
 * 获取 left 属性值
 * <p>
 * @param elem dom
 * */
export declare function getLeft(elem: any): any;
/**
 * 事件绑定
 * <p>
 * @param elem dom
 * @param events 事件
 * @param handler 事件回调
 * */
export declare function on(elem: any, events: any, handler: any): void;
/**
 * 单次事件
 * <p>
 * @param elem dom
 * @param events 事件
 * @param handler 事件回调
 * */
export declare function once(elem: any, events: any, handler: any): void;
/**
 * 事件解除
 * <p>
 * @param elem dom
 * @param events 事件
 * @param handler 事件回调
 * */
export declare function off(elem: any, events: any, handler: any): void;