TypeScript 型定義の練習
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interface User {↵
id: string;↵
name: string;↵
email: string;↵
age?: number;↵
}↵
↵
type UserRole = "admin" | "user" | "guest";↵
↵
const createUser = (name: string, role: UserRole): User => {↵
return {↵
id: crypto.randomUUID(),↵
name,↵
email: `${name}@example.com`,↵
};↵
};
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UTF-8•TypeScript