Serve Conditional JavaScript & CSS Files with Conditionizr

Conditionizr is a fast and lightweight (3KB) javascript utility that detects browser and pixel ratio, allowing you to serve conditional JavaScript and CSS files. Rebuilt from it’s jQuery predecessor, it’s now 50% faster. Combined with class name additions, Conditionizr has an integrated script and style loading facility, allowing you to specify which scripts and styles you’d like to load for which browser.
Browser sniffing is often considered unreliable, and Conditionizr was built to overcome this goal. The core functionality within Conditionizr is detecting and serving Internet Explorer legacy scripts and styles. With this in mind, using a similar method to the way Google Analytics detects browsers.