Modernizr is a JavaScript library that detects which HTML5 and CSS3 features your visitor’s browser supports. In detecting feature support, it allows developers to test for some of the new technologies and then provide fallbacks for browsers that do not support them.

Why is Modernizr used?

Modernizr is a JavaScript library that detects which HTML5 and CSS3 features your visitor’s browser supports. In detecting feature support, it allows developers to test for some of the new technologies and then provide fallbacks for browsers that do not support them.

What is the benefit of using the JavaScript library Modernizr?

Modernizr is a JavaScript library that detects the features available in a user’s browser. This lets web pages avoid unsupported features by informing the user their browser isn’t supported or loading a polyfill.