What are Partial and Required utility types?

interface User {
  name: string;
  email: string;
  age: number;
}

// All properties become optional
type PartialUser = Partial<User>;
// { name?: string; email?: string; age?: number; }

// Great for update functions
function updateUser(id: string, updates: Partial<User>) {
  // Can pass any subset of properties
}

updateUser("123", { name: "John" }); // OK
updateUser("123", { age: 31 });      // OK

interface Config {
  host?: string;
  port?: number;
  ssl?: boolean;
}

// All properties become required
type RequiredConfig = Required<Config>;
// { host: string; port: number; ssl: boolean; }

function initServer(config: Required<Config>) {
  // All properties guaranteed
}

interface Post {
  id: string;
  title: string;
  content: string;
  author?: string;
}

// Create post without id
type CreatePost = Partial<Omit<Post, "id">>;