javascript with mixins code example

Example: mixins javascript

let bird = {
  name: "Donald",
  numLegs: 2
};

let plane = {
  model: "777",
  numPassengers: 524
};

let flyMixin = function(obj) {
  obj.fly = function() {
    console.log("Flying, wooosh!");
  }
};

flyMixin(bird);
flyMixin(plane);

bird.fly(); // "Flying, wooosh!"
plane.fly(); // "Flying, wooosh!"