如何使用JSON查询交叉引用属性

{
  "users": [
    {
      "id": 1,
      "name": "Alice",
      "profile": {
        "age": 30,
        "city": "New York"
      }
    },
    {
      "id": 2,
      "name": "Bob",
      "profile": {
        "age": 25,
        "city": "Los Angeles"
      }
    }
  ]
}

const data = {
  "users": [
    {
      "id": 1,
      "name": "Alice",
      "profile": {
        "age": 30,
        "city": "New York"
      }
    },
    {
      "id": 2,
      "name": "Bob",
      "profile": {
        "age": 25,
        "city": "Los Angeles"
      }
    }
  ]
};

const result = data.users.map(user => ({
  name: user.name,
  age: user.profile.age
}));

console.log(result);

[
  { "name": "Alice", "age": 30 },
  { "name": "Bob", "age": 25 }
]

const result = data.users.map(user => {
  const age = user.profile && user.profile.age;
  return {
    name: user.name,
    age: age !== undefined ? age : null
  };
});

console.log(result);