Check if an object is empty

JavaScript version
const isEmpty = (obj) => Reflect.ownKeys(obj).length === 0 && obj.constructor === Object;
// Or for enumerable property names only
const isEmpty = (obj) => JSON.stringify(obj) === '{}';
TypeScript version
const isEmpty = (obj: object): boolean => Reflect.ownKeys(obj).length === 0 && obj.constructor === Object;
const isEmpty = (obj: object): boolean => JSON.stringify(obj) === '{}';