Steady.js

http://lafikl.github.io/steady.js/

A jank-free module to do logic on the onscroll event without performance regressions in a @media-query like conditions.

lab/teehan_lax_navigation

https://github.com/alexcican/lab/tree/gh-pages/teehan_lax_navigation

lab/teehan_lax_navigation

The navigation bar is being hidden once you start scrolling. As soon as you scroll up a few pixels it is shown. After that, when you scroll down again it gets hidden. When you have reached the bottom of this page the main menu reappears.