Javascript Module Loader

app.js

// All modules must have a init function.
/**
 * ready Function
 * @param fn
 */
function ready(fn) {
    if (document.readyState != 'loading'){
        fn();
    } else {
        document.addEventListener('DOMContentLoaded', fn);
    }
}
ready(function(){
    /**
     * Module Initiator
     * Make sure the module has a `init()` function. If so > initiate.
     */
    for (var module in myApp) {
        if('init' in myApp[module]){
            myApp[module].init();
        }
    }
});

module.js

/**
 * myApp.lazyImageLoader
 */
(function(window, myApp, undefined) {

    function initiateLazyImageLoader() {
      //TODO: This function will be used to lazy load the images where required.
    }

    // Public methods when this object is instantiated
    // Expose `init` to module loader.
    myApp.lazyImageLoader = {};
    myApp.lazyImageLoader.init = initiateLazyImageLoader;
})(window, window.myApp = window.myApp || {});