ES6 code, with classes

es6-classes-impl.js

/* ES6 code, with classes */
class Civilian {
    constructor(name) {
        this.name = name;
    }
    danger() {
        console.log("Run away!");
    }
};
 
class SuperHero extends Civilian {
    constructor(name, ability) {
      super(name); // Call the super class constructor
        this.ability = ability;
    }
    danger() { // Override the super class method
        console.log("Never fear, " + this.name + " is here!");
        console.log(this.name + " uses " + this.ability + ". It's super effective.");
    }
};