CODEWITHSUNDEEP
javascriptinheritancedefineproperty
fyaa
fyaa

Reputation: 676

Javascript inheritance of properties defined with Object.defineProperty

I have the following parent class...

function Parent(id, name, parameters) {
  Object.defineProperty(this, "id", {
    value: id
  });

  Object.defineProperty(this, "name", {
    value: name,
    writable: true
  });
};

and the corresponding child class:

function Child(id, name, parameters) {
  Object.defineProperty(this, "phone", {
    value: parameters.phone,
    writable: true
  });
};

I tried to apply inheritance by adding something like Child.prototype = Object.create(Parent.prototype); , but this obviously does not work.

How can I inherit from the Parent class such that I can use the properties id and name.

Upvotes: 1

Views: 1375

Answers (1)

Bergi
Bergi

Reputation: 664630

I tried to apply inheritance by adding something like Child.prototype = Object.create(Parent.prototype);

Yes, you should do that, to create a prototype chain between your .prototype objects. You have your methods defined on them, don't you?

How can I inherit from the Parent class such that I can use the properties id and name.

You basically need a "super" call to the Parent constructor so that it sets up your properties on Child instances:

function Child(id, name, parameters) {
  Parent.call(this, id, name, parameters);
  Object.defineProperty(this, "phone", {
    value: parameters.phone,
    writable: true
  });
}

Upvotes: 3

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