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/* ES5 code, without classes */
var Civilian = function Civilian(name) {
    this.name = name;
};
Civilian.prototype.danger = function () { console.log("Run away!"); };
 
var SuperHero = function(name, ability) {
    Civilian.call(this, name); // Call the super class constructor.
    this.ability = ability;
};

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/* ES6 code, with classes */
class Civilian {
    constructor(name) {
        this.name = name;
    }
    danger() {
        console.log("Run away!");
    }
};
 

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class Parent {
  constructor() { } // Custom constructor (optional.) If one is not provided, the example here is used a default constructor.
 
  // Methods
  method() { } // Simple instance methods
  static staticMethod() { } // Static methods that can be called on the constructor, e.g. A.staticMethod.
 
  // Getter/setter methods - similar to ES5 equivalents.
  get prop()  { return this.x; }
  set prop(x) { this.x = x; }

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/* The use of super() in an eval() introduces complexity in the compiler implementation. */
class Child extends Parent {
    method() {
      // This method needs a reference to Parent available when super() is called.      
      // Chakra can determine this during the Parser stage.
      super();
    }
    methodEval() {
      // This method also needs a reference to Parent available when super() is
      // called, however Chakra doesn’t know for sure until we execute the code