js中将对象转成json

// 定义一个JavaScript对象
let person = {
    name: "张三",
    age: 30,
    isStudent: false,
    courses: ["数学", "英语"],
    address: {
        city: "北京",
        street: "朝阳路"
    }
};

// 将对象转换为JSON字符串
let jsonString = JSON.stringify(person);

console.log(jsonString);

let a = {};
let b = {a: a};
a.b = b;

try {
    JSON.stringify(a);
} catch (e) {
    console.error("循环引用导致错误:", e);
}

let obj = {
    name: "张三",
    birthDate: new Date(),
    sayHello: function() { console.log("你好!"); }
};

let jsonString = JSON.stringify(obj);
console.log(jsonString); // 函数sayHello不会被序列化

let jsonString = JSON.stringify(obj, (key, value) => {
    if (typeof value === 'function') {
        return undefined; // 忽略函数
    }
    if (value instanceof Date) {
        return { _type: 'Date', value: value.toISOString() }; // 自定义日期格式
    }
    return value;
});