What is the best way to retrieve a nested data type?

I am working with an interface named IFoo

interface IFoo {
  name: string;
  version: number;
  init: (arg1: string, arg2: number) => Promise<string[]>;
}

I am interested in the type of init. Is there a way to extract it so that I can use this interface elsewhere?

inteface ICustom {
  properties: {
    group: string,
    init: IFoo.init
  }
  amount: number
}

Answer №1

To access specific properties, you can utilize an indexed access type:

interface IFoo {
  name: string;
  version: number;
  init: (arg1: string, arg2: number) => Promise<string[]>;
}

interface ICustom {
  properties: {
    group: string,
    init: IFoo["init"]
  }
  amount: number
}

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