YUI3 - how to load modules synchronously?

In order to load missing modules, YUI allows us to specify them in use(...) method, pass in a callback and perform our actions when all modules are loaded - asynchronously. This presents a number of problems in my case. More specifically, I find it impossible to instantiate my class outside of the current file if I have my classes created inside the callback (no guarantee that they will be ready by the time "new" happens). My work-around was to wrap only certain method calls in YUI.use(...) but this creates another problem with extending objects. Ideally, what I need to do is load all modules synchronously before any of my code executes. Below is my code that currently ~~fails~~ succeeds (EDIT: Allow Rollups).

HTML:

<html>
<head>
<!-- Built using YUI dep configurator -->
<!-- JS -->
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/yui/yui-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/oop/oop-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/event-custom/event-custom-base-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/event/event-base-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/dom/dom-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/dom/dom-style-ie-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/pluginhost/pluginhost-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/node/node-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/event/event-base-ie-min.js"></script>
<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/event/event-delegate-min.js"></script>


<!-- My JS -->
<script type="text/javascript" src="test.js"></script>

<script type="text/javascript">
    var test = new MyNS.ExtendingClass();
</script>

</head>

<body>
    <h1>Hello World!</h3>
</body>
</html>

test.js

//namespace
if (!MyNS) var MyNS = {};

(function(){
    var Y = YUI().use('node', 'io', 'autocomplete');

    MyNS.BaseClass = function() {
        console.log('Base class newed. Y: ' + Y);

        var self = this;

        self.init();
    };

    MyNS.BaseClass.prototype = {
        init: function() {
            console.log('Initting! Y: ' + Y);
        }
        , test: function() {
            console.log('test fired!');
        }
    };
})();

(function(){
    var Y = YUI().use('node');

    MyNS.ExtendingClass = function() {
        console.log('Extended class newed. Y: ' + Y);

        var self = this;

        MyNS.ExtendingClass.superclass.constructor.call(self);
    };

    MyNS.ExtendingClass.prototype = {
        testExtended: function() {
            console.log('testExtended fired!');
        }
    };

    Y.extend(MyNS.ExtendingClass, MyNS.BaseClass);
})();

This code now works but requires 10 (!!!) js files to make it happen. Is there a way to make sure all dependencies are loaded dynamically and before my code is executed? There must be, right?

Solution

You can solve this by putting each of your classes inside their own YUI module and use YUI to do the namespacing.

Create a new file my-classes.js, containing both your class definitions:

YUI().add('baseClass', function(Y) {
    // constructor  
    Y.namespace('NS').BaseClass = function () {
        this.msg = 'hi!';
    }

}, '1', {requires: ['oop', 'node', 'event']}); // dependencies for your class

YUI().add('extendingClass', function(Y) {
    // constructor  
    Y.namespace('NS').ExtendingClass = function () {
        Y.NS.ExtendingClass.superclass.constructor.call(this);
        alert(this.msg);
    }      

    Y.extend(Y.NS.ExtendingClass, Y.NS.BaseClass);

}, '1', {requires: ['baseClass']});

Include the YUI seed file in your page:

<script type="text/javascript" src="http://yui.yahooapis.com/3.3.0/build/yui/yui-min.js"></script>

Also include your class file and an init file:

<script type="text/javascript" src="my-classes.js"></script>
<script type="text/javascript" src="my-init.js"></script>

In your init file:

YUI().use('extendingClass', function(Y) {
    Y.test = new Y.NS.ExtendingClass();
})

Now all the dependencies should be resolved and loaded up, before your code executes. It is asynchronous, however you asked for a solution that would ensure everything was loaded before your code executed.

Hope this helps.