如何在Javascript中切换引用其状态

// 创建两个对象
let obj1 = { name: 'Alice', age: 25 };
let obj2 = { name: 'Bob', age: 30 };

// 变量引用obj1
let person = obj1;
console.log(person); // 输出: { name: 'Alice', age: 25 }

// 切换引用状态，现在person指向obj2
person = obj2;
console.log(person); // 输出: { name: 'Bob', age: 30 }

// 错误示例
let obj1 = { name: 'Alice', age: 25 };
let person = obj1;
person = { name: 'Bob', age: 30 }; // obj1现在无法访问，可能导致内存泄漏

// 正确示例
let obj1 = { name: 'Alice', age: 25 };
let person = obj1;
obj1 = null; // 释放obj1的引用
person = { name: 'Bob', age: 30 };

// 错误示例
let obj1 = Object.freeze({ name: 'Alice', age: 25 });
let person = obj1;
person.age = 26; // 这行代码不会改变obj1的状态，因为obj1是不可变的

// 正确示例
let obj1 = { name: 'Alice', age: 25 };
let person = obj1;
person.age = 26; // 这行代码会改变obj1的状态