Using an object literal to create an object with other objects as properties.

Hi All,

I was going to ask this on stack overflow but thought I would get rinsed for asking such a question :)

But I have just done the Object Oriented JS course, which I finished quite quick as I understand the concepts of OO from PHP.

So I have created two classes Dog and Owner, an I was tinkering about with creating an object literal to then set the properties to new instances of the created classes.

The Dog class is nothing special and hold only the constructor method which then sets 3 properties.

The Owner class has two setters and getters, but I'm wondering if the instantiate the Owner class to a property within the object literal named collection to hold this information.

the Dog and Owner Classes:

class Dog
{
    constructor (breed, name, age) 
    {
        this.breed = breed;
        this.name = name;
        this.age = age;
    }
}


class Owner
{
    set owner(owner)
    {
        this._owner = owner;
    }

    get owner () 
    {
        return this._owner;
    }

    set number(number)
    {
        this._number = number;
    }


    get number ()
    {
        return this._number;
    }
}

The collection object literal:

const collection = {

    ownerClass: new Owner(),
    setOwnerName: ownerClass.owner = 'David',
    setOwnerNumber: ownerClass._number = 1245,
    dogClass: new Dog('Pitbull', 'Kim', 10),

}

The error that is returned when I console.log collection it states ownerClass is not defined? To me setting the setters of owner and number for the Owner class won't be allowed in an object literal ?