Inflearn コミュニティ Q&A

import { Equal, Expect } from "./helper";

export const fakeDataDefaults = {
  foo: "bar",
  bar: 123,
  baz: true,
};

type objType = typeof fakeDataDefaults;

export type FooType = objType["foo"];
export type BarType = objType["bar"];
export type BazType = objType["baz"];

type tests = [
  Expect<Equal<FooType, string>>,
  Expect<Equal<BarType, number>>,
  Expect<Equal<BazType, boolean>>
];