--description--
When an object inherits its prototype
from another object, it also inherits the supertype's constructor property.
Here's an example:
function Bird() { }
Bird.prototype = Object.create(Animal.prototype);
let duck = new Bird();
duck.constructor
But duck
and all instances of Bird
should show that they were constructed by Bird
and not Animal
. To do so, you can manually set the constructor property of Bird
to the Bird
object:
Bird.prototype.constructor = Bird;
duck.constructor
--instructions--
Fix the code so duck.constructor
and beagle.constructor
return their respective constructors.
--hints--
Bird.prototype
should be an instance of Animal
.
assert(Animal.prototype.isPrototypeOf(Bird.prototype));
duck.constructor
should return Bird
.
assert(duck.constructor === Bird);
Dog.prototype
should be an instance of Animal
.
assert(Animal.prototype.isPrototypeOf(Dog.prototype));
beagle.constructor
should return Dog
.
assert(beagle.constructor === Dog);
--seed--
--seed-contents--
function Animal() { }
function Bird() { }
function Dog() { }
Bird.prototype = Object.create(Animal.prototype);
Dog.prototype = Object.create(Animal.prototype);
// Only change code below this line
let duck = new Bird();
let beagle = new Dog();
--solutions--
function Animal() { }
function Bird() { }
function Dog() { }
Bird.prototype = Object.create(Animal.prototype);
Dog.prototype = Object.create(Animal.prototype);
Dog.prototype.constructor = Dog;
Bird.prototype.constructor = Bird;
let duck = new Bird();
let beagle = new Dog();