Demo "Call to a function that returns an animate() [...]" is unclear

[Chealer]

I fail to understand the title for demo "Call to a function that returns an animate() with a callback and executes before and after callbacks", using the following function:

function the_one_with_expr($data)
{
    return
        PheryResponse::factory('.test2')
        ->css(array('backgroundColor' => 'red', 'color' => '#fff'))
        ->html('<pre>'. strip_tags($data['new-onthefly-var']) . '</pre>')
        ->show()
        ->merge(thisone($data));
}

What does "an animate()" mean?

[pocesar]

it refers to $.animate(). the before and after callbacks are independent to the registered function that has been set using Phery->set(), they are called before and after an AJAX call has occurred

[Chealer]

If this refers to jQuery.animate(), I consider that there is a single jQuery.animate(). I do not see how this would happen with the function defined, but maybe this is supposed to read "a function that returns a PheryResponse which will invoke jQuery.animate()"?

Note that the demo seems buggy. The page scrolls up when I launch it for the first time, but not enough to show the zone of the manipulated element (1920x1080 resolution, Firefox).