Mostly polyfills for html5 elements in IE ;)
polyfills for IE<9, check for touch to add html.touch to create a touch optimised experience (or a no-touch experience for desktop) in terms of hovers, etc.
Nothing ATM. Mainly because I'm not sure what it can do that css fallbacks can't. It just seems to add a layer of complexity that I don't need. Is it true or am I missing something?
http://bradfrostweb.com/demo/mobile-first). But there are certainly lots of use cases for feature detection.Geolocation, touch events and other HTML5 features fall outside of CSS fallbacks. I'll rarely detect for CSS features unless I'm using them to conditionally load in a script (See this for example:
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