export declare const isBrowser: boolean;
export type RequestQuery = Record<string, string | number | undefined | Array<string | number>>;
export type Query<T extends RequestQuery = {}> = {
    version?: string;
    lang?: string | "zh";
} & T;
type RequestType = "json" | "form" | "formdata";
export declare class PixivWebAPIError extends Error {
    name: string;
    constructor(message: string);
}
export declare const request: (endpoint: string, query?: RequestQuery, data?: any, type?: RequestType) => Promise<Response>;
export declare const requestJSON: <T = any>(endpoint: string, query?: RequestQuery, data?: any, type?: RequestType) => Promise<T>;
export declare const requestJSONAPI: <T = any, U = unknown>(endpoint: string, query?: RequestQuery, data?: any, type?: RequestType) => Promise<T>;
export {};