模块

Ts支持和JS一样的导出语法 主要是 ES模块

// @filename: animal.ts
export type Cat = { breed: string; yearOfBirth: number };
export interface Dog {
  breeds: string[];
  yearOfBirth: number;
}
// @filename: app.ts
import { Cat, Dog } from "./animal.js";
type Animals = Cat | Dog

// @filename: animal.ts
export type Cat = { breed: string; yearOfBirth: number };
// 'createCatName' cannot be used as a value because it was imported using 'import type'.
export type Dog = { breeds: string[]; yearOfBirth: number };
export const createCatName = () => "fluffy";
// @filename: valid.ts
import type { Cat, Dog } from "./animal.js";
export type Animals = Cat | Dog;
// @filename: app.ts
import type { createCatName } from "./animal.js";
const name = createCatName();

// @filename: app.ts
import { createCatName, type Cat, type Dog } from "./animal.js";
export type Animals = Cat | Dog;
const name = createCatName();