Detect Browser Features Easy using Feature.js

A Fast, simple and lightweight browser feature detection library written in plain JavaScript. Try it by opening this page in different browsers and seeing the results:
 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.

Demo

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