Require TypeScript interfaces to include all index types from a union

I have a union type defined as:

type A = "a" | "b" | "c";

Now, I want to create an interface like this:

interface B {
  [index: A]: string
}

However, I need this interface to include all options from the union type, resulting in the following interface:

interface B {
  a: string;
  b: string;
  c: string;
}

Is it possible to achieve this in TypeScript?

Answer №1

To accomplish this task, you can utilize a mapped type like so:

type B = {
  [Key in A]: string
};

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