js 判断json属性的值

let jsonObject = {
  "name": "Alice",
  "age": 25,
  "isStudent": true,
  "courses": ["Math", "English"]
};

if (jsonObject.hasOwnProperty('name') && jsonObject.name === 'Alice') {
  console.log('Name is Alice');
}

if (typeof jsonObject.age === 'number') {
  console.log('Age is a number');
}

if (Array.isArray(jsonObject.courses) && jsonObject.courses.includes('Math')) {
  console.log('Alice is taking Math');
}

let complexObject = {
  "user": {
    "name": "Bob",
    "details": {
      "age": 30,
      "isActive": true
    }
  }
};

if (complexObject.user && complexObject.user.details && complexObject.user.details.age === 30) {
  console.log('User age is 30');
}

if (jsonObject.hasOwnProperty('unknownProperty')) {
  // 安全地访问属性
} else {
  console.log('Property does not exist');
}