Strange behavior of Object.defineProperty() in JavaScript

Question

I was playing with below javascript code. Understanding of Object.defineProperty() and I am facing a strange issue with it. When I try to execute below code in

Answer 1

Whenever you use".defineProperty" method of object. You should better define all the properties of the descriptor. Because if you don't define other property descriptor then it assumes default values for all of them which is false. So your console.log checks for all the enumerable : true properties and logs them.

//Code Snippet 
let profile = {
  name: 'Barry Allen',
}

// I added a new property in the profile object.
Object.defineProperty(profile, 'age', {
  value: 23,
  writable: true,
  enumerable : true,
  configurable : true
})

console.log(profile)
console.log(profile.age)