Encapsulated JS Objects with Module Pattern (with static variables across instances of modules)

foobar-with-static-variables.js

var Foobar = (function () {

    /* Static variables across instances of modules */

    var _FOO = 'foo';

    // Constructor
    var module = function (foo) {

        /* Private variables */

        var _foo = foo || 'default';

        /* Private functions */

        function magic() {

            _foo = 'magic';
        }

        /* Public functions (__proto__ for static) */

        this.__proto__.getFOO = function () {

            return _FOO;
        }

        this.__proto__.setFOO = function (FOO) {

            _FOO = FOO;
        }

        this.getFoo = function () {

            return _foo;
        }

        this.setFoo = function (foo) {

            _foo = foo;
            magic();
        }
    }

    return module;
})();