CSS Animations
Jon Neal über CSS Animations
CSS animations also have their limitations, which is why I support their use only under certain circumstances. Right now, CSS animations don’t affect page layout—if you move or scale an element, it doesn’t really move or scale, only it’s visual representation does. To that end, animations that affect layout are not yet appropriate for CSS —jQuery’s element.Hide() and element.Show(), for example, do affect layout. A CSS animation would not be an appropriate substitute for this behavior.