/**
 * lodash的pull方法不会相应到前端渲染，手动消除的可以
 */
export declare function pull(arr: any[], item: any): any[];
/**
 * 时间戳转化为可读事件
 * @param timestamp
 */
export declare function timestampToTime(timestamp: number): string;
/**
 * 字节转化为可读单位
 * @param size 字节
 */
export declare function sizeHumanfy(size: number): string;
export declare function imageCompress(file: File, width: number): Promise<File>;
export declare function readerPage(pdf: any, preview: HTMLCanvasElement, context: CanvasRenderingContext2D, pageNum: number): void;