expand attribute of foundational interface

My current situation is as follows:

interface A {
  x: {
    f1(s: string): string;
  };
}

interface B extends A {

}

I am looking to enhance interface A by adding a new method called f2 within the context of interface B, without redefining f1. It would look something like this:

interface B extends A {
  x: {
    f2(s: string): string;
  };
}

Is this achievable? I'd appreciate any references or documentation on this topic.

Answer №1

To implement this functionality, I would suggest using a generic approach similar to the following:

interface Feature1 {
    action1(input: string): string;
}

interface Feature2 {
    action2(input: string): string;
}

interface Container<T> {
  feature: T
}

interface Container1 extends Container<Feature1> {}

interface Container2 extends Container<Feature2> {}

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