How do Module Types work in TypeScript?

// types.ts
export interface User {
  id: string;
  name: string;
}

export type Status = "active" | "inactive";

// Can also export inline
export type { User, Status };

// app.ts
import { User, Status } from "./types";

const user: User = {
  id: "1",
  name: "John"
};

// Explicitly import only types (removed in JS output)
import type { User } from "./types";

// Inline type modifier
import { type User, createUser } from "./user";

// index.ts
export type { User } from "./user";
export type { Product } from "./product";

// Export everything
export * from "./types";

import * as Types from "./types";

const user: Types.User = { ... };