Private var inside Javascript literal object
var foo = {

    self: null,

    init: function() {
        self = this;
        self.doStuff();
    },

    doStuff: function() {
        //stuff here
    }

}

var foo = (function() {
  var self = null
  return {
    init: ...,
    doStuff: ...
  };
})();

init: function() {
  this.self = this;
  this.self.doStuff();
},

var foo = function() {
    var self = null;

    return {
      init: function() {
        self = this;
        self.doStuff();
      },

      doStuff: function() {
        //stuff here
      }
    };
}();

var foo = {

  self: null,

  init: function() {
    this.self = this;
    this.self.doStuff();
  },

  doStuff: function() {
    //stuff here
  }

}

var foo = (function(){

  var self = null;

  return {

    init: function() {
      self = this;
      self.doStuff();
    },

    doStuff: function() {
      //stuff here
    }
  };

}());