用js将json首字母大写

function capitalizeKeys(obj) {
    if (typeof obj !== 'object' || obj === null) {
        return obj;
    }

    if (Array.isArray(obj)) {
        return obj.map(item => capitalizeKeys(item));
    }

    return Object.keys(obj).reduce((acc, key) => {
        const capitalizedKey = key.charAt(0).toUpperCase() + key.slice(1);
        acc[capitalizedKey] = capitalizeKeys(obj[key]);
        return acc;
    }, {});
}

// 示例使用
const data = {
    name: "john doe",
    age: 30,
    address: {
        street: "123 main st",
        city: "anytown"
    },
    hobbies: ["reading", "gaming"]
};

const capitalizedData = capitalizeKeys(data);
console.log(capitalizedData);

{
    "Name": "john doe",
    "Age": 30,
    "Address": {
        "Street": "123 main st",
        "City": "anytown"
    },
    "Hobbies": ["reading", "gaming"]
}