/// <reference types="miniprogram-api-typings" />
interface File {
    path: string;
    url: string;
    size: number;
    name: string;
    type: string;
    time: number;
    image: boolean;
}
export declare function isImageUrl(url: string): boolean;
export declare function isImageFile(item: File): boolean;
export declare function isVideo(res: any, accept: string): res is WechatMiniprogram.ChooseVideoSuccessCallbackResult;
export declare function chooseFile({ accept, multiple, capture, compressed, maxDuration, sizeType, camera, maxCount }: {
    accept: any;
    multiple: any;
    capture: any;
    compressed: any;
    maxDuration: any;
    sizeType: any;
    camera: any;
    maxCount: any;
}): Promise<WechatMiniprogram.ChooseImageSuccessCallbackResult | WechatMiniprogram.ChooseVideoSuccessCallbackResult | WechatMiniprogram.ChooseMessageFileSuccessCallbackResult>;
export declare function isFunction(val: unknown): val is Function;
export declare function isObject(val: any): val is Record<any, any>;
export declare function isPromise<T = any>(val: unknown): val is Promise<T>;
export {};