ImgSupport.js

A javascript library to detect support for less common image formats like WebP, JPEG-2000, and JPEG-XR.

Usage

Include the script on your page. Call the ImgSupport.test() method which takes a callback function as its first argument. The callback function will be passed an object containing information about which image formats are supported by the browser.

<script src="ImgSupport.js"></script>
<script>
  ImgSupport.test(function(supports){
    console.log(supports);
  });
</script>

The above example outputs the following to the console:

{
  "jp2": 0,
  "jpx": 0,
  "webp-alpha": 1,
  "webp-animation": 1,
  "webp-lossless": 1,
  "webp-lossy": 1
}

Features

Image support is cached by default using HTML5 LocalStorage if the browser supports it.

Demo

See it in action here

License

This is free and unencumbered software released into the public domain. For more information, please refer to http://unlicense.org