Typescript error : Property defined as private on type Class is defined as public on type Interface

Question

I just started a new project in TypeScript 0.9.5 and the following code is throwing an error :

Class Service declared IService but does not implement it. Property 'getUserInfo' defined as private on type Service is defined as public on type IService

 module App.Interfaces {

     export interface IService {
        getUserInfo(): void;

    }   
}

module App.Services {

    export class Service implements App.Interfaces.IService {

        private getUserInfo(): void { }

    }   
}

For as long as I've used TypeScript I know that interfaces cannot have access modifiers! What gives?

Typescript playground example

Answer 1

You can't have the private access modifier on the getUserInfo function on the Service class as it's declared on the interface IService.

If the class is a IService, it needs to have all of the functions/properties of the interface declared publicly.

module App.Services {

    export class Service implements App.Interfaces.IService {

        /* private <= remove */ getUserInfo(): void { }

    }   
}