如何获取嵌套的数组字段

// 假设数据结构为JSON格式
const data = {
  name: "John",
  age: 30,
  hobbies: ["reading", "coding", "gaming"],
  address: {
    street: "123 Main St",
    city: "New York",
    country: "USA",
    contacts: [
      { name: "Alice", phone: "123456789" },
      { name: "Bob", phone: "987654321" }
    ]
  }
};

// 递归函数来获取嵌套的数组字段
function getNestedArrayField(obj, field) {
  if (Array.isArray(obj)) {
    for (let i = 0; i < obj.length; i++) {
      getNestedArrayField(obj[i], field);
    }
  } else if (typeof obj === "object") {
    for (let key in obj) {
      if (key === field && Array.isArray(obj[key])) {
        console.log(obj[key]); // 输出目标嵌套数组字段的值
      }
      getNestedArrayField(obj[key], field);
    }
  }
}

// 调用函数获取名为"contacts"的嵌套数组字段
getNestedArrayField(data, "contacts");