2. [[Prototype]] Class.prototype me.__proto__

01

The pervious might lesson be wrong about __proto__, as you can see the Person class .prototype but the instance me has the attribute __proto__

So figure out,

  • difference between __proto__ and .prototype or [[Prototype]]
  • if __proto__ is 'depricated'

Note, both contain the methods of the class 

class Person {
    talk(){
        return 'Talking'
    }
}
const me = new Person()
me.__proto__
Person.prototype == me.__proto__

02

We will use __proto__ on instances of classes until we learn otherwise, as you can see Perosn.prototype == me.__proto__ is true 

class Person {
    talk(){
        return 'talking'
    }
}
const me = new Person()
Person.prototype == me.__proto__

03

The methods reside in .prototyp and .__proto__. 

class Person {
    talk(){
        return 'Talking'
    }
}
const me = new Person()
Person.prototype.talk
me.__proto__.talk

04

I think if you alter the method of an instance like me in it's __proto__ it changes the talk() method in the Person class prototype where the methods 

class Person {
    talk(){
        return 'Talking'
    }
}
const me = new Person()


me.__proto__.talk = () => {
    return 'new talking instance'
}
Person.prototype.talk

Notice how the Person class .prototye method of talking when the .__proto__ talk() method is changed to return 'new talking method'

05

Summary of this part of tutorial is

  • that __proto__ is still used,
  • is methods changed in __proto__ of an instance, it will also change the method of the parent class like the talk() method in Person.prototype