Методы Object.keys(), Object.values() и Object.entries() позволяют получить информацию о свойствах объекта.
let obj = {
name: "John",
age: 30,
city: "New York"
};
console.log(Object.keys(obj)); // ["name", "age", "city"]
console.log(Object.values(obj)); // ["John", 30, "New York"]
console.log(Object.entries(obj)); // [["name", "John"], ["age", 30], ["city", "New York"]]
