Modernizr.js in a Theme or Module for Drupal 8, 9, and 10

In developing the theme for your website it's important to take accessibility into account. Making your site available and functional for as many users as possible is always a good idea. Progressive enhancement and graceful degradation are key, but how do you go about accounting for the minute differences between browser capabilities? This is where the Modernizr.js library can help you out.

Modernizr is a collection of browser detection tests which allow you, in either CSS or JavaScript, to determine if a particular browser supports a large list of features. From there it can automatically add classes to your page depending on the results of a particular feature test. It can also be used to create additional custom tests. In this tutorial we'll take a look at a few of the feature detection tests that Modernizr natively supports as well as how a custom test can be added to a Drupal theme.

Theming Drupal Sites