SOURCE

const obj = {};
const obj2 = null;
const obj3 = {
    name: 'jake'
}


console.log(JSON.stringify(obj) === '{}');
console.log(JSON.stringify([]) === '{}');
console.log(JSON.stringify(null) === '{}');
console.log(JSON.stringify(undefined) === '{}');




console.log(Object.getOwnPropertyNames(obj).length === 0);
// console.log(Object.getOwnPropertyNames(undefined).length === 0);
console.log(Object.getOwnPropertyNames('hello').length === 0);





console.log(Object.keys(obj).length === 0);
// console.log(Object.keys(undefined).length === 0);
console.log(Object.keys('undefined').length === 0);