如何遍历JSON

function traverseJSON(obj) {
  for (var key in obj) {
    if (typeof obj[key] === 'object' && obj[key] !== null) {
      traverseJSON(obj[key]); // 递归遍历嵌套对象
    } else {
      // 对每个属性执行操作，例如打印或获取值
      console.log(key + ': ' + obj[key]);
    }
  }
}

var json = {
  "name": "John",
  "age": 30,
  "address": {
    "city": "New York",
    "country": "USA"
  }
};

traverseJSON(json);

var json = {
  "name": "John",
  "age": 30,
  "address": {
    "city": "New York",
    "country": "USA"
  }
};

for (var key in json) {
  if (typeof json[key] === 'object' && json[key] !== null) {
    for (var nestedKey in json[key]) {
      console.log(nestedKey + ': ' + json[key][nestedKey]);
    }
  } else {
    console.log(key + ': ' + json[key]);
  }
}