인프런 커뮤니티 질문&답변

interface FruitMap {
  apple: "red";
  banana: "yellow";
  orange: "orange";
}

type TransformedFruit = {
  [key in keyof FruitMap]: `${key}:${FruitMap[key]}`;
}[keyof FruitMap];

type tests = [
  Expect<
    Equal<TransformedFruit, "apple:red" | "banana:yellow" | "orange:orange">
  >
];

덕분에 typescript 재밋습니다 :)