Error to correct for Object.create

[Pierre-Thibault]

I don't know how to edit the first code example at https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/create. It says: "// inherited properties can be overwritten" but there is no property overwritten on this line. It creates a new property at the object level. The property is still present in the prototype and can be access using Object.getPrototypeOf(me).isHuman. Maybe it should say that properties can be override and that the original property can still be accessed in the prototype.

[AnilSeervi]

At first, we have an Object Literal named person,

const person = {
  isHuman: false,
  printIntroduction: function() {
    console.log(`My name is ${this.name}. Am I human? ${this.isHuman}`);
  }
};

On line: 8, in the demo example, a new object is created from the existing person object using the Object.create() method.

const me = Object.create(person);

Note that this creates a new object and doesn't just reference the person object.

On line: 10, you see a new property is being set on the me object, but not on person

me.name = 'Matthew'; // "name" is a property set on "me", but not on "person"

The same goes with overwriting the already defined properties, On line: 11

me.isHuman = true; // inherited properties can be overwritten

And on line: 13, the printIntroduction() method is invoked, which just logs the expected output:

me.printIntroduction();
// expected output: "My name is Matthew. Am I human? true"

---

Hope this helps you understand what the example is trying to convey!

[Pierre-Thibault]

No, at line 11, the inherited property is not overwritten. We still can access it:

Object.getPrototypeOf(me).isHuman;

It overrides the property.

[AnilSeervi]

Object.getPrototypeOf() will return you the prototype(object) from which it was created(Object.create())

So, According to the demo example, Object.getPrototypeOf(me) will return you the person object. You can check by the following:

Object.getPrototypeOf(me) === person    // true

and in your previous comment you are checking isHuman property on the person object, which is not overwritten.

[Pierre-Thibault]

Yes, it is the point. Nothing is overwritten. me.isHuman = true overrides the property from the prototype. The document says "overwritten" and it should say overridden. At least it is what I believe to be appropriate.

[AnilSeervi]

IDK, overwritten seems fine to me.
StackOverflow - https://stackoverflow.com/questions/8651562/overwrite-or-override

[Pierre-Thibault]

OK. I disagree. Since the previous value is still available. I think override would be more appropriate.

[pepelsbey]

Closing as answered/settled.