February 2015
filamentgroup/fixed-sticky · GitHub
A position: sticky polyfill that works with filamentgroup/fixed-fixed for a safer position:fixed fallback.
September 2013
Stick your landings! position: sticky lands in WebKit - HTML5Rocks Updates
position: sticky is a new way to position elements and is conceptually similar to position: fixed. The difference is that an element with position: sticky behaves like position: relative within its parent, until a given offset threshold is met in the viewport
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