Typescript Get request

class MakeRequests {
  private baseURL: string;

  constructor(baseURL: string) {
    this.baseURL = baseURL;
  }

  private async makeRequest<T>(requestInfo: RequestInfo): Promise<T> {
    const jsonResponse: Awaited<T> = await fetch(requestInfo)
      .then((response: Response) => response.json())
      .then((json: T) => json);
    return jsonResponse;
  }

  public async getPosts(): Promise<Record<string, unknown>> {
    const jsonResponse: Record<string, unknown> = await this.makeRequest(
      new Request(`${this.baseURL}posts/1`, {
        headers: new Headers({ "Content-Type": "application/json" }),
      })
    );
    return jsonResponse;
  }
}

const makeRequests: MakeRequests = new MakeRequests(
  "https://jsonplaceholder.typicode.com/"
);
export default makeRequests;