Proof of concept about inheritance in JS without classes

index.js

function Animal(animalName, animalType) {
    let name = animalName;
    const type = animalType;
  
    return {
        getName() {
            return name;
        },
        setName(newName) {
            name = newName;
        },
        introduceItself() {
            console.log(`My name is ${name} and I am a ${type}`);
        }
    };
}

function Dog(name) {
    const s = Animal(name, 'dog');
  
  return {
        ...s,
        introduceItself() {
            console.log('Woff!!');
        },
        formalIntroduce() {
            s.introduceItself();
        } 
  };
}

const ulises = Animal('Ulises', 'Human');
const linda = Dog('Linda');
console.log(ulises.getName()); // Ulises
linda.introduceItself(); // Woff!!
linda.formalIntroduce(); // My name is Linda and I am a dog
linda.setName('Ambrosia');
console.log(linda.getName()); // Ambrosia