TS 一个类型的部分转换为可选

type WithPartial<T, K extends keyof T> = Omit<T, K> & Partial<Pick<T, K>>;

interface RequestOption {
  url: string,
  method: 'GET' | 'POST' | 'PUT',
  headers: {[key: string]: string},
  body: string
}

interface ResponData {
  status: string,
  data: any,
  error: Error
}

function request(option: WithPartial<RequestOption, 'headers'|'body'>): Promise<Omit<ResponData, 'error'> | Omit<ResponData, 'data'>> {
  return Promise.resolve({
    status: 'AT-400',
    data: {}
  });
}