更新typescript中对象内的嵌套对象

interface User {
  id: number;
  name: string;
  address: {
    street: string;
    city: string;
    country: string;
  };
}

function updateUserAddress(user: User, newAddress: Partial<User['address']>): User {
  return {
    ...user,
    address: {
      ...user.address,
      ...newAddress,
    },
  };
}

const user: User = {
  id: 1,
  name: 'John Doe',
  address: {
    street: '123 Main St',
    city: 'New York',
    country: 'USA',
  },
};

const newAddress = {
  city: 'San Francisco',
};

const updatedUser = updateUserAddress(user, newAddress);
console.log(updatedUser);