如何在javascript中动态构建JSON？

// 创建空的JavaScript对象
var jsonData = {};

// 添加属性和值
jsonData.name = "John";
jsonData.age = 25;
jsonData.email = "john@example.com";

// 嵌套对象
jsonData.address = {
  street: "123 Main St",
  city: "New York",
  country: "USA"
};

// 嵌套数组
jsonData.skills = ["JavaScript", "HTML", "CSS"];

// 将JavaScript对象转换为JSON字符串
var jsonString = JSON.stringify(jsonData);

console.log(jsonString);

{
  "name": "John",
  "age": 25,
  "email": "john@example.com",
  "address": {
    "street": "123 Main St",
    "city": "New York",
    "country": "USA"
  },
  "skills": ["JavaScript", "HTML", "CSS"]
}