JavaScript Binding Objects

You need to save a reference to this in the outer Class function and call call:

var instance = this;

this.methods = {
  get: function(callback) {
    callback.call(instance);
  }
};

var Class = function() {
    // Save a reference to this that can be used in local closures.
    var me = this;

    this.name = 'John';

    this.methods = {
        get: function(callback) {
            // Use 'call()', passing the reference to the 'Class' object
            callback.call(me);
        }
    };
};

@SLaks - The declaration of scope as a Global variable is bad practice. @Ferdinand Beyer - have you tested if it functions?

The better way will be the scope binding. The Prototype javascript framework produced a nice concept and we can easily implement it like

Function.prototype.bind = function(scope) {
  var _function = this;

  return function() {
    return _function.apply(scope, arguments);
  }
}

and then yoou code should have only a single change and it will maintin the scope of your class.

var Factory = (function() {

  var Class = function() {

    this.name = 'John';
    var me = this;
    this.methods = {
      get: function(callback) {

        callback();
      }
    };

  };

  return {
    createClass: function() {
      return new Class();
    }
  };

}());

var MyClass = Factory.createClass();



MyClass.methods.get(function() {
   console.info(this.name) // => returns undenfined
}.bind(MyClass));

I mean only the function call get with .bind(MyClass)