Typescript + Angular expose service method

Question

I'm using typescript and angular on a project. When i want to expose service's method i do the following :

export class MyService implements IService {

    //Public method
    public myMethod: Function;

    public constructor() {

        this.myMethod= this._myMethod;

    }

    private _myMethod(): void {
       //...
    }

When i work on service which get many method, i don't have to scroll to see method's definition so that's great. But now when i'm using my service's method in another service or controller, i can't see signature of my method... So i'm loosing typescript advantages...

Any idea ?

Thanks.

1. Are the methods listed in the IService interface ? 2. Are you declaring the injected service in the controller to be of type IService ? — Omri Aharon
– Omri Aharon, Commented Feb 5, 2015 at 10:10
That's why you're not seeing the signature/intellisense. You need to specify on your declaration in the DI in the controller that your service is of the type you say it is. — Omri Aharon
– Omri Aharon, Commented Feb 5, 2015 at 10:31

Ross Scott · Accepted Answer · 2015-02-05 12:52:34Z

1

The simple answer is that you need to give your function definition a signature

class MyService {
    public myMethod: () => void; //don't use Function

    constructor() {
        this.myMethod = this.myMethod;
    }

    _myMethod = () => {

    }

}

However a better approach is to define an interface:

interface IMyService extends IService {
    myMethod: () => void;
}

class MyService implements IMyService {
    constructor() {

    }

    myMethod = () => {

    }
}

edited Feb 5, 2015 at 12:52

answered Feb 5, 2015 at 11:05

Ross Scott

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