Modernizr

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

Modernizr tests which native CSS3 and HTML5 features are available in the current UA and makes the results available to you in two ways: as properties on a global Modernizr object, and as classes on the <html> element. This information allows you to progressively enhance your pages with a granular level of control over the experience.

Modernizr has an optional (not included) conditional resource loader called Modernizr.load(), based on Yepnope.js. You can get a build that includes Modernizr.load(), as well as choosing which feature tests to include on the Download page.

New Asynchronous Event Listeners

Often times people want to know when an asynchronous test is done so they can allow their application to react to it. In the past, you've had to rely on watching properties or <html> classes. Only events on asynchronous tests are supported. Synchronous tests should be handled synchronously for speed and consistency reasons.

The new api looks like this:

// Listen to a test, give it a callback
Modernizr.on('testname', function( result ) {
  if (result) {
    console.log('The test passed!');
  }
  else {
    console.log('The test failed!');
  }
});

We guarantee that we'll only invoke your function once (per time that you call on). We are currently not exposing a method for exposing the trigger functionality. Instead, if you'd like to have control over async tests, use the src/addTest feature, and any test that you set will automatically expose and trigger the on functionality.

Test suite

Run the test suite

Building Modernizr v3

To generate everything in 'config-all.json':

grunt build
//outputs to ./dist/modernizr-build.js

To run tests (in phantom):

grunt qunit

To run tests (in browser):

grunt build
serve .
visit <url>/test

To see simple build in browser:

serve the root dir, <url>/test/modular.html

To see the build tool:

checkout the modernizr.com code
install all your gems and bundles and jekyll and shit
jekyll
serve ./_sites
visit /download
It should be just a big list of things you can build with no frills.

API Reference

Modernizr can be used programmatically via npm:

var modernizr = require("modernizr");

Building

A build method is exposed for generating custom Modernizr builds. Example:

var modernizr = require("modernizr");

var result = modernizr.build({}, function (result) {
  console.log(result.code); // full source
  console.log(result.min); // minfied output
});

The first parameter takes a JSON object of options and feature-detects to include. See lib/config-all.json for all available options.

The second parameter is a function invoked on task completion.

License

MIT license

drygiel/Modernizr