Javascript Module pattern, Prototype and Google Cl

I am having trouble getting this code structure to survive obfuscation with the Google Closure Compiler. Here's some sample code:

var MyModule = (function()
{   
    function myModule()
    {
        // Constructor
    }

    function moduleFoo(url)
    {
        // Method
    }

    function moduleBar()
    {
        // Method
    }

    myModule.prototype = {
        constructor: myModule,
        foo: moduleFoo,
        bar: moduleBar
    };

    return myModule;

})();

Elsewhere in my code I need be able to write things like the following:

var myMod = new MyModule();
myMod.foo();
myMod.bar();

However the compiler is renaming everything (as expected). How can I make the prototype that I have defined available elsewhere in my code after obfuscation? I have tried exporting as follows:

// In place of the prototype object above
myModule.prototype['constructor'] = myModule;
myModule.prototype['foo'] = moduleFoo;
myModule.prototype['bar'] = moduleBar;

window['myModule'] = myModule;

But things seem to break down either when the prototype methods are called or when their corresponding closures are executed.

Any help is appreciated.

This exact pattern does not work well with Closure-compiler using ADVANCED_OPTIMIZATIONS. Instead, you will need to slightly refactor your code:

/** @constructor */
function MyModule()
{
    // Constructor
}

(function() {
    function moduleFoo(url)
    {
        // Problem using "this" keyword. Will require @this annotation.
    }

    MyModule.prototype = {
        foo: moduleFoo
    };

    MyModule.prototype.bar =  function() {
        // "this" keyword works fine.
    };
})();

Or like:

/** @const */
var MyNamespace = {};

(function() {
    /** @constructor */
    MyNamespace.MyModule = function() {};

    MyNamespace.MyModule.prototype = {
        constructor: function() {},
        foo: function(url) {},
        bar: function() {}
    };
})();

With either of the above methods your exports should work correctly.

Note: The second option will only work with a compiler built from the latest source as it involves a bug that was just fixed last week.