Originally published at: http://www.sitepoint.com/device-detection-apps-wurfl-js/
Responsive web design is not a new topic to mobile developers, many of us are well versed in the process and best practice guidelines. One of these best practices is displaying page elements in different ways based on the browser or device capabilities of the user. To accomplish this designers have traditionally made use of User-Agent strings embedded in HTTP headers. These would generally only tell you if the device used was an iPhone, Android or Desktop computer, no other information.
There are many occasions when a developer needs to know more detail than this to create a fully responsive design. This is where WURFL.js (Wireless Universal Resource File) can help.
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