What is the name of the technique of doing object oriented design in JavaScript without class or prototype?

Years ago I used this technique because I did not know how to do it "right" with prototype. It's a technique I call Christmas tree OOD. You make a function which is like a constructor that makes a new object, attaches new properties to it, like a Christmas tree, and return the reference to it. Here is an example:

function RigidBody() {
    const newRB = document.createElement('canvas');
    
    newRB.dataMember = 5;
  
    newRB.memberFunction = function() {
        // do important rigid body stuff
    }

    return newRB;
}

Then you can use this function as a kind of base object to make other derived objects.

function Ship(locX, locY) {
    const newShip = new RigidBody();

    newShip.otherDataMember = 34;

    newShip.otherMemberFunction = function() {
        // some other important ship specific stuff to do
    }

    return newShip;
}

You can see that this simple thing I did can make N number of objects with a full "class" hierarchy of objects. Then you can just make an object of the derived object.

    const myShip = new Ship(100, 200);

I use class now and I don't plan on using this in the future but I'm curious to know if others have used this technique and if it has a name.