export interface RequestInit {
    method?: string;
    headers?: HeadersInit;
    body?: string;
    timeout?: number;
    redirect?: 'follow' | 'error';
}
export type HeadersInit = Record<string, string> | Array<[string, string]> | Headers;
export declare class Headers {
    private readonly values;
    constructor(init?: HeadersInit);
    append(name: string, value: string): void;
    set(name: string, value: string): void;
    get(name: string): string | null;
    has(name: string): boolean;
    delete(name: string): void;
    forEach(callback: (value: string, name: string, headers: Headers) => void): void;
    entries(): Array<[string, string]>;
}
export declare class Response {
    private readonly bodyText;
    readonly status: number;
    readonly statusText: string;
    readonly ok: boolean;
    readonly headers: Headers;
    constructor(bodyText: string, status: number, statusText: string, headers?: Headers);
    text(): Promise<string>;
    json<T = unknown>(): Promise<T>;
}
/**
 * Fetches a URL and returns a promise that resolves with the response.
 * @param input the URL to fetch
 * @param init the request init options
 * @returns a promise that resolves with the response
 */
export declare function fetch(input: string, init?: RequestInit): Promise<Response>;