Feature.js – Light­weight Browser Feature Detec­tion Library

Feature.js is a fast, simple and light­weight browser feature detec­tion library. It has no dependencies and weighs only 1kb minified and gzipped. Feature.js automati­cally initia­lizes itself on page load, so you don’t have to. It doesn’t, however, run any tests while ini­tia­lizing, so it will only ever run them when you ask it to. This makes it perform very fast.

With Feature.js, it’s simple to build progres­sively enhanced expe­riences that use feature detection to determine if a code can be execu­ted in the user’s browser. It is licensed under MIT license.

Requirements: JavaScript Framekwork
Demo: http://featurejs.com/
License: MIT License