I am trying understand mixins in javascript and all the examples and articles i have read so far talk about adding methods and not properties.
I have found Alex Jover Morales' article really useful and i have slightly modified his example to include an additional mixin and constructors with new properties within the mixins here.
Is what i have done below an anti-pattern? Is there a problem with having a constructor and properties within a mixin? Is there a problem with calling super() within each mixin's contructor?
const PlayMixin = superclass => class extends superclass {
constructor(args) {
let { favouriteGame } = args
super(args);
this.favouriteGame=favouriteGame;
}
play() {
console.log(`${this.name} is playing ${this.favouriteGame}`);
}
};
const FoodMixin = superclass => class extends superclass {
constructor(args) {
let { genericFood } = args
super(args);
this.genericFood=genericFood;
}
eat() {
console.log(`${this.name} is eating ${this.genericFood}`);
}
poop() {
console.log("Going to ");
}
};
class Animal {
constructor(args) {
let {name} = args
this.name = name
}
}
class Dog extends PlayMixin(FoodMixin(Animal)) {
constructor(...args) {
super(...args)
}
bark() {
console.log("Woff woff!")
}
haveLunch() {
this.eat();
this.poop();
}
}
const jack = new Dog({name:"Jack", genericFood:"lobster",
favouriteGame:"chess"});
jack.haveLunch();
jack.play();.as-console-wrapper { max-height: 100%!important; top: 0; }