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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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