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Modernizr - a JavaScript library allowing you to use CSS3 & HTML5 while maintaining control over unsupported browsers

Filing a bug?

• Read this page before filing a new issue

HTML5 Cross browser Polyfills

• links to shims and polyfills that add functionity of new features to older browser. they work well in combo with modernizr's detects.

Undetectables

• things that maybe cannot be feature detected.

Community Detects

• Feature detections beyond Modernizr Core. Basically best practice detects for everything worth detecting. Some written tests have not been committed yet.

How We Test

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Server-side implementations

• modernizr-server (php)
• gwtmodernizr
• rack modernizr (ruby)
• django modernizr
• modernizr-rails (rails 3.1+)
• detector (php)
• Modernizr for Grails / (github sources) (Grails 1.3++)
• Modernizr for Rails Asset Pipeline

Other feature detection projects:

• ringmark
• netzgesta supports
• html5test
• has.js covers common browser bugs and base features
• Raynos/feature covers Host object detection
• diveintohtml5 peeks pokes and pointers & detect everything (deprecated)

Device detection projects:

• Categorizr modern device detection script that categorizes devices into 4 categories; desktop, tv, tablet, or mobile

Related projects

• caniuse uses Modernizr for testing, but its a human-curated list of features and their availability in past and future browsers. (Plus % share of browsers with each feature)
• html5please recommends how to implement a number of newer browser features.
• browserfeatures is a JSON document cross-referencing features and the various browser bug tracker tickets that own them

Sites that use Modernizr

• Twitter, Github, NFL, posterous, finishline, american eagle, ... http://trends.builtwith.com/topsites/Modernizr

Modernizr is used by projects like

• Polymaps
• HTML5Widgets
• Plone