type OnError = (eventSource: EventSource, event: Event) => void;
type BaseFetchOptions = Omit<RequestInit, 'headers' | 'signal'> & {
    headers?: HeadersInit | Headers;
};
type Transformer<T> = (message: string) => T;
interface BaseSSEProps<T = string> {
    baseURL?: string;
    type?: SSEType;
    onFinish?: (data: T[]) => void;
    onAbort?: (data: T[]) => void;
    transformer?: Transformer<T>;
    onMessage?: (message: T) => void;
}
interface SSEWithFetchProps {
    baseOptions?: BaseFetchOptions;
    onError?: (e: unknown) => void;
}
interface SSEWithSSEProps {
    baseOptions?: EventSourceInit;
    onError?: OnError;
    onOpen?: () => void;
}
type SSEType = 'fetch' | 'sse' | 'sip';
/**
 * @deprecated 已经废弃, 请使用 hook-fetch 代替
 * @deprecated This class has been deprecated, please use hook-fetch instead.
 *
 * @see {@link https://jsonlee12138.github.io/hook-fetch/ | hook-fetch 官方文档}
 * @see {@link https://jsonlee12138.github.io/hook-fetch/ | hook-fetch Document}
 */
export type SSEProps<T> = BaseSSEProps<T> & (SSEWithSSEProps | SSEWithFetchProps);
/**
 * @deprecated 已经废弃, 请使用 hook-fetch 代替
 * @deprecated This class has been deprecated, please use hook-fetch instead.
 *
 * @see {@link https://jsonlee12138.github.io/hook-fetch/ | hook-fetch 官方文档}
 * @see {@link https://jsonlee12138.github.io/hook-fetch/ | hook-fetch Document}
 */
export declare class XRequest<T> {
    #private;
    constructor({ baseURL, onAbort, onMessage, onError, baseOptions, transformer, type, onFinish, ...props }?: SSEProps<T>);
    send(url: string, options?: EventSourceInit | BaseFetchOptions): this;
    abort(): void;
}
export {};