How about append default header for axios and typescript style.

[ynishi]

Hi there, very thanks to make js interface from type based safety api!

I used 'type to axios style api', and thought that it is more useful for development(flexibility) to inject default header "Content-value 'application/json'" and body as {}(this maybe axios behavior likely bug. When none body is passed, header is not inject if header value is passed.).

How about inject axios default header Content-Type 'application/json' and body as {} or merged with body like {...body}?
Example output like below.

export interface XRequest {
  xId: XID;
  message: string;
}

// this setting supports cors(of course when server support)
export const postX = (body: XRequest) => {
  return axios.post(
    endpoint + "/conv",
    { ...body },
    {
      headers: {
        "Content-Type": "application/json"
      }
    }
  );
};

I think it is easy to fix and provide more seamless work for api with client lib also under development environment.