js 转换对象

// 定义一个对象
const person = {
  name: "Alice",
  age: 30,
  city: "New York"
};

// 序列化对象为JSON字符串
const jsonString = JSON.stringify(person);
console.log(jsonString); // 输出: {"name":"Alice","age":30,"city":"New York"}

// 反序列化JSON字符串为对象
const parsedPerson = JSON.parse(jsonString);
console.log(parsedPerson); // 输出: { name: 'Alice', age: 30, city: 'New York' }

function replacer(key, value) {
  if (value instanceof Date) {
    return { __type: 'Date', value: value.toISOString() };
  }
  return value;
}

function reviver(key, value) {
  if (value && value.__type === 'Date') {
    return new Date(value.value);
  }
  return value;
}

const obj = {
  name: "Bob",
  birthDate: new Date()
};

const jsonString = JSON.stringify(obj, replacer);
console.log(jsonString); // 输出包含日期信息的JSON字符串

const parsedObj = JSON.parse(jsonString, reviver);
console.log(parsedObj.birthDate instanceof Date); // 输出: true