title: web framework support both desktop & mobile web browser?
body: <p>I want to make an application which can automatically detect &amp; load different UIs for the desktop browser and mobile browser. </p>
  
  <p>I'm looking for some easy and automatic way to do it. I wonder if there exist any web application framework which support this feature for their pre-defined UI widget? So that I can just focus on the functionality of the website and forget the cross-platform stuff.</p>
  
  <p>all platforms and languages are okie.</p>