Harvey: A Second Face for Your JavaScript

When media queries finally reached a state of good support across a lot of browsers, we started to make our web applications adapt to our users’ devices by optimizing the layout to focus on the content.
But now that we’ve grown to like and incorporate this new adaptive approach, what’s next? We set foot on fairly new grounds not too long ago and so we are still discovering new corners of this land we call Responsive Web Design. One of the things that we will explore next is the ability to add different modes of interaction to our sites, i.e., conditionally executing different JavaScript based on the screen dimensions of the rendering device.

 http://techtime.getharvest.com/blog/harvey-a-second-face-for-your-javascript