Why hasOwnProperty returns false on a constructor function but string property returns true when accessed without instantiating the function

Question

I basically understand, hasOwnProperty method in JavaScript is used to check whether the object has the specified property as its own property.

But the behaviour I checked in browser console below got me downright confused. Can someone explain me why this is happening. I did try finding existing answer, but couldnt find a relevant link.

Answer 1

If you check the typeof Shape it will return you a "function" but typeof s will return "object"

When you call var s = new Shape(); Shape will considered as class but name and size are members of Shabe class.

Default constructor will called on new Shape() and creates a object of Shape.