Mixin functional composition example

index.js

const compose = (...fns) => fns.reduceRight(
    (prevFn, nextFn) => (...args) => nextFn(prevFn(...args)),
    value => value
);


const EatMixin = Superclass => class extends Superclass {
    eat(food) {
        console.log(`eating ${food}`);
    }
}


const BarkMixin = Superclass => class extends Superclass {
    bark(word) {
        console.log(`bark ${word}`);
    }
}

class Animal {

}

const SuperDog = compose(EatMixin, BarkMixin)(Animal);

const dog = new SuperDog();

dog.bark('hihi');