如何读取嵌套的json对象？

Question

我创建了一个像这样的对象。

myObj =  {
	  "name":"John",
	  "age":30,
	  "cars": [
		  "car1":"Ford",
		  "car2":"BMW",
		  "car3":"Fiat"
	  ]
   }

我可以轻松阅读姓名和年龄，但我想阅读对象“cars”下的内容（键值）。我想在下拉列表中放置键值，这样如果从汽车中选择任何键，那么我将得到各自的值。 谢谢！

Answer 1

只需按myObj.cars.car1，myObj.cars.car2和myObj.cars.car3直接或循环播放，如下例所示

＆＃13;

＆＃13;

var myObj = {
  "name": "John",
  "age": 30,
  "cars": {
    "car1": "Ford",
    "car2": "BMW",
    "car3": "Fiat"
  }
};

for (let i in myObj) {
  if (typeof myObj[i] == 'object') {
    for (let j in myObj[i]) {
      console.log(j, myObj[i][j]);
    }
  } else {
    console.log(i, myObj[i]);
  }
}

＆＃13;

＆＃13;

＆＃13;

Answer 2

使用点运算符，您可以通过它来访问属性

myObj = {
    "name":"John",
    "age":30,
    "cars": {
        "car1":"Ford",
        "car2":"BMW",
        "car3":"Fiat"
    }
 }
 console.log(myObj.cars.car1);
  console.log(myObj.cars.car2);
   console.log(myObj.cars.car3);