js中怎么获取当前属性值

let obj = {
    name: 'Alice',
    age: 25
};

console.log(obj.name); // 输出: Alice

let obj = {
    name: 'Alice',
    age: 25
};

let propertyName = 'name';
console.log(obj[propertyName]); // 输出: Alice

let obj = {
    name: 'Alice',
    age: 25
};

Object.keys(obj).forEach(key => {
    console.log(key + ': ' + obj[key]);
});
// 输出:
// name: Alice
// age: 25

let obj = {
    name: 'Alice',
    age: 25
};

for (let key in obj) {
    if (obj.hasOwnProperty(key)) { // 确保属性属于对象本身
        console.log(key + ': ' + obj[key]);
    }
}
// 输出:
// name: Alice
// age: 25