example of inheritance in javascript

inheritance.js

//father class
var classA = (function() {
  
  function classA() {
    
    this.val1 = "a";
  }

  
  classA.prototype.method1 = function() {
    console.log("my class is " + this.val1);
  }
    
  return classA;
}());



//child class
var classB = (function(_super) {
    
  classB.prototype = Object.create(_super.prototype);
  
  function classB() {
    
    _super.call(this);
    this.val2 = "b";
  }

  classB.prototype.method2 = function() {
    
    this.method1();
    console.log("my class is " + this.val2 + " -> " +  this.val1);
  }
    
  return classB;
}(classA));



//classe figlia figlia
var classC = (function(_super) {
  
  classC.prototype = Object.create(_super.prototype);
  
  function classC() {
    
    _super.call(this);
    this.val3 = "c";
  }
  
  classC.prototype.method2 = function() {
    
    _super.prototype.method2.call(this);
    console.log("called from class " + this.val3);
  };
  
  
  classC.prototype.method3 = function() {
    
    console.log("my class is " + this.val3 + " -> " + this.val2 + " -> " + this.val1);
  };
  
  return classC;
}(classB));


var v  = new classC();
v.method2();