js 循环遍历json数据

let jsonObj = {
    "name": "John",
    "age": 30,
    "city": "New York"
};

for (let key in jsonObj) {
    if (jsonObj.hasOwnProperty(key)) {
        console.log(key + ": " + jsonObj[key]);
    }
}

let jsonArray = [
    {"name": "John", "age": 30},
    {"name": "Anna", "age": 22},
    {"name": "Peter", "age": 43}
];

jsonArray.forEach(function(item) {
    console.log(item.name + ": " + item.age);
});

let jsonObj = {
    "name": "John",
    "age": 30,
    "city": "New York"
};

for (let [key, value] of Object.entries(jsonObj)) {
    console.log(key + ": " + value);
}

function traverseJSON(obj) {
    for (let key in obj) {
        if (typeof obj[key] === 'object' && obj[key] !== null) {
            traverseJSON(obj[key]); // 递归调用
        } else {
            console.log(key + ": " + obj[key]);
        }
    }
}

let nestedJson = {
    "a": 1,
    "b": {
        "c": 2,
        "d": {
            "e": 3
        }
    }
};

traverseJSON(nestedJson);