在javascript中从JSON对象获取值

const jsonObject = {
  name: "John",
  age: 30,
  city: "New York"
};

console.log(jsonObject.name); // 输出 "John"
console.log(jsonObject.age); // 输出 30
console.log(jsonObject.city); // 输出 "New York"

const jsonObject = {
  name: "John",
  age: 30,
  city: "New York"
};

console.log(jsonObject["name"]); // 输出 "John"
console.log(jsonObject["age"]); // 输出 30
console.log(jsonObject["city"]); // 输出 "New York"

const jsonObject = {
  name: "John",
  age: 30,
  city: "New York"
};

const property = "age";
console.log(jsonObject[property]); // 输出 30

const jsonString = '{"name": "John", "age": 30, "city": "New York"}';
const jsonObject = JSON.parse(jsonString);

console.log(jsonObject.name); // 输出 "John"