js json添加键值对

let jsonObject = {};
jsonObject.newKey = "newValue";

let jsonObject = {};
jsonObject["newKey"] = "newValue";

// 创建一个空的JSON对象
let jsonObject = {};

// 添加键值对
jsonObject.name = "Alice";
jsonObject.age = 30;
jsonObject.isStudent = false;

// 或者使用方括号语法
jsonObject["course"] = "Computer Science";

console.log(jsonObject);
// 输出: { name: 'Alice', age: 30, isStudent: false, course: 'Computer Science' }

let notAnObject = "I am not an object";
notAnObject.newKey = "newValue"; // TypeError: Cannot add property newKey, object is not extensible

let jsonObject = {};
jsonObject.newKey = "newValue"; // 正确

let jsonObject = {};
jsonObject["first-name"] = "Alice"; // 正确