js如何输出json格式

let jsonObject = {
    name: "张三",
    age: 30,
    isStudent: false,
    courses: ["数学", "英语"],
    address: {
        city: "北京",
        street: "朝阳路"
    }
};

let jsonString = JSON.stringify(jsonObject, null, 2);
console.log(jsonString);

// 创建一个JSON对象
let user = {
    firstName: "John",
    lastName: "Doe",
    age: 28,
    email: "john.doe@example.com",
    isActive: true,
    hobbies: ["reading", "gaming", "traveling"]
};

// 将JSON对象转换为字符串
let userJsonString = JSON.stringify(user, null, 2);

// 输出JSON字符串
console.log(userJsonString);

function replacer(key, value) {
    if (typeof value === "string") {
        return value.replace(/\n/g, "\\n").replace(/\t/g, "\\t");
    }
    return value;
}

let jsonString = JSON.stringify(jsonObject, replacer, 2);