Javascript module storing globals in an easy jQuery like way

globals_module

<script type="text/javascript">

    (function(){

        // These are <<functions>> exposed on the object as properties.
        var _publics = {
            globals       : _globals
        };

     /* ----------------------------------------------------------------
        Setup. One Time (first time through) only
        ---------------------------------------------------------------- */
        _globals.vars = {};

     /* ----------------------------------------------------------------
        Setting:            concept.globals('test',5);
        Multiple setting:   concept.globals({test: 5, front: 17});
        Reading:            concept.globals('test');
        Multiple reading:   concept.globals()
        ---------------------------------------------------------------- */
        function _globals() {

            // No arguments at all, means we return the whole object
            if (arguments.length === 0) {
                return _globals.vars;
            }

            // First argument is an object
            if (typeof arguments[0] === "object") {

                // Empty object means existing values are retained
                _globals.vars = $.extend({}, _globals.vars, arguments[0] || {});
            } 

            // One argument - is seeking a value
            if (arguments.length === 1) {
                return _globals.vars[arguments[0]];
            }

            // Two arguments .... the first is property name, second is value
            if (arguments.length > 1) {
                _globals.vars[arguments[0]] = arguments[1];
            }
        }                


     /* ----------------------------------------------------------------------------
        THE MAIN FUNCTION
        ---------------------------------------------------------------------------- */
        function _main(in_obj) {
           console.log('---------- OBJECT CALL -------------');
        }

        // make this available everywhere, at all times !
        window.concept = _main;

        // Add additional properties to the ui_dialog, so that we can call them using
        // function-like calls  eg ui_dialog.close()
        // Uses ES6 method
        Object.assign(window.concept, _publics);

    })(jQuery);


    function test() {
      console.log('TEST 1: initial reading');
      console.log(concept.globals());

      console.log('TEST 2: setting single value');
      concept.globals('test2','my test 2');
      console.log(concept.globals());

      console.log('TEST 3: multiple setting');
      concept.globals({test2: 'still test 2', "test 3": "Foo"});
      console.log(concept.globals());

      console.log("TEST 4: single reading");
      console.log(concept.globals('test 3'));
    }

</script>