Is it possible for me to incorporate a portion of the interface?

Is it possible to partially implement an interface?

export interface AuthorizeUser {
  RQBody: {
    login: string;
    password: string;
  };
  RSBody: {
    authorizationResult: AuthorizationResult;
  };
};
class AuthorizeUserRQBody implements AuthorizeUser['RQBody'] {
  @IsString()
  login: string;

  @IsString()
  password: string;
}

I encountered the issue

A class can only implement an identifier/qualified-name with optional type arguments.

Answer №1

It is not possible to implement something that is not an interface itself.

You must extract that and turn it into an interface or type.

interface RequestBody {
  username: string;
  password: string;
}

interface ResponseBody {
  result: Result;
}

interface AuthenticateUser {
  RequestBody: RequestBody;
  ResponseBody: ResponseBody;
};

class AuthenticateUserRequestBody implements RequestBody {
  @IsString()
  username: string;

  @IsString()
  password: string;
}

You may also consider renaming RequestBody and ResponseBody to avoid having fields and interfaces with the same name.

If you try using Ctrlspace after the name AuthenticateUser or inside [""], you will notice that it does not provide any useful suggestions, indicating that what you are trying to achieve is not feasible.

If you truly need AuthenticateUser['RequestBody'], you could explore using namespaces as a potential solution.

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