Why doesn't the constructor property inherit?

Question

JavaScript

There is a constructor:

function Manipulate (){
      this.btn = 1 ;
      this.ul  = 2;
       };

There is a method:

Manipulate.prototype.test = () => this.btn +this.ul;

There is inheritance:
const add = Object.create(Manipulate);
Why does the check say that add does not inherit the test method?
console.log(add.hasOwnProperty('test')); //false

Answer 1

https://developer.mozilla.org/en-US/docs/Web/JavaS...

Answer 2

First, Object.create creates an object from a prototype without calling a constructor, and you need to pass a prototype to it . const add = Object.create(Manipulate.prototype);With a constructor call, you need to write like this: const add = new Manipulate('id1', 'id2');
I will add that the arrow function does not have its own context, its this is from the closure, you need a full-fledged function or object method

Answer 3

in brackets id is written in quotes like

Answer 4

It's true. The quotes will be in the parameter of the add function. The question is, why does the check say that add does not inherit test? Right now I'll edit to be more abstract.