Single Page App - Overriding Swap in Sammy

spa-overridingSwap.js

 // implements a 'fade out'/'fade in'
 
 this.swap = function(content, callback) {
    
    var context = this;
    context.$element().fadeOut('slow', function() {
        context.$element().html(content);
        context.$element().fadeIn('slow', function() { 
             if (callback) {
                callback.apply();
             }
         }); 
    });
 };