How to use the new affix plugin in twitter's bootstrap 2.1.0?

Question

The bootstrap documentation on that topic is a little confusing to me. I want to achieve similar behaviour like in the docs with the affix navbar: The navbar is below a para

Answer 1

Similar to the accepted answer, you can also do something like the following to do everything in one go:

$('#nav').affix({
  offset: { top: $('#nav').offset().top }
}).wrap(function() {
  return $('
', {
    height: $(this).outerHeight()
  });
});​

This not only invokes the affix plugin, but will also wrap the affixed element in a div which will maintian the original height of the navbar.