Class definitions for lesser code

In order to minimize the amount of code is preferable to use private attributes and methods (AA&MM). The next example shows how to do it in a simple way. You can see how to access either private or public AA&MM.

The accessibility boundary of variables in JavaScript starts from the point where they are declared to every function invoked from that point including callbacks and either setTimeout() or setInterval().

If you have to define an instantiable class you may use the definition of the dynamic class called MainClass in this example:

function MainClass () {
     // ------------------------------------ Private attributes & methods
     var me = this,
         privateVar = 1;
     function init() {
        bindEvents();
     }
     function bindEvents() {
        $('.aSelector').on('click', ClickOn_aSelector);
     }
     function ClickOn_aSelector(e) {
         e.preventDefault();
         privateFunc();
         me.publicMethod();
         // "me." allows to access public methods or attributes 
         //       from either private or public methods.
     }
     function privateFunc () {
       console.log(privateVar);
       console.log(me.publicAtt);
     }
     // ------------------------------------ Public attributes & methods
     this.publicAtt = 2;
     this.publicMethod = function () {
        var _myself = this;
        privateFunc();
        _myself.publicMethod2(3)
     };
     this.publicMethod2 = function (pNum) {
        console.log (privateVar + this.publicAtt + pNum); // 6
     };
     //
     init();
  };

var oMainClass = new MainClass();
oMainClass.publicMethod();