js stringify

// 示例代码：使用 JSON.stringify 方法将 JavaScript 对象转换为 JSON 字符串

const person = {
  name: "Alice",
  age: 25,
  isStudent: false,
  courses: ["Math", "Science"],
  address: {
    city: "Beijing",
    country: "China"
  }
};

// 将对象转换为 JSON 字符串
const jsonString = JSON.stringify(person);
console.log(jsonString);
// 输出: {"name":"Alice","age":25,"isStudent":false,"courses":["Math","Science"],"address":{"city":"Beijing","country":"China"}}

// 可以传递第二个参数来指定要序列化的属性或修改输出格式
const jsonStringWithReplacer = JSON.stringify(person, ["name", "age"]);
console.log(jsonStringWithReplacer);
// 输出: {"name":"Alice","age":25}

// 可以传递第三个参数来美化输出的 JSON 字符串
const prettyJsonString = JSON.stringify(person, null, 2);
console.log(prettyJsonString);
// 输出:
// {
//   "name": "Alice",
//   "age": 25,
//   "isStudent": false,
//   "courses": [
//     "Math",
//     "Science"
//   ],
//   "address": {
//     "city": "Beijing",
//     "country": "China"
//   }
// }