export declare function getCoords(evt: any): {
    x: any;
    y: any;
};
export declare function noop(): void;
export declare function intBetween(min: number, max: number, val: number): number;
export declare const scrollBoundary = 20;
/**
 * 单次滚动的最大距离
 */
export declare const MAX_SPEED = 30;
export declare const getScrollSpeed: (number: number) => number;