ES6 Mixins

gistfile1.js

var mixin = require('mixin');

class Cyclist {
    ride() {
        console.log(`${this.name} is riding`);
    }   
}

class Swimmer {
    swim() {
        console.log(`${this.name} is swimming`);
    }
}

class Runner {
    run() {
        console.log(`${this.name} is running`);
    }
}

class Triathlete extends
    mixin(mixin(Cyclist, Swimmer), Runner) {
        
    constructor(name) {
        this.name = name;
    }

    letsDoIt() {
        this.ride();
        this.swim();
        this.run();
    }
}

let bob = new Triathlete('Bob');
bob.letsDoIt();