twbs/bootstrap — pull request #15154 by nickyod (2014-11-16 21:04:47+00:00)
Title: Fixes affix-top class not applying

Use scrollTop instead of colliderTop which uses the elements
offset().top, as the offset top does not account for padding.

This issue can be replicated by using a navbar-fixed-top and applying
relevant padding to the body. (A navbar-static-top with no padding on
the body does not encounter this issue)

Fixes #15078